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230420013 = 376806671
BaseRepresentation
bin11011011101111…
…10111000101101
3121001120112211120
431232332320231
5432441420023
634510411153
75465352315
oct1556767055
9531515746
10230420013
1110907aa6a
1265200ab9
1338978505
1422860445
15153678e3
hexdbbee2d

230420013 has 4 divisors (see below), whose sum is σ = 307226688. Its totient is φ = 153613340.

The previous prime is 230419999. The next prime is 230420017. The reversal of 230420013 is 310024032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 230420013 - 26 = 230419949 is a prime.

It is a super-3 number, since 3×2304200133 (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 230419974 and 230420001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230420017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38403333 + ... + 38403338.

It is an arithmetic number, because the mean of its divisors is an integer number (76806672).

Almost surely, 2230420013 is an apocalyptic number.

It is an amenable number.

230420013 is a deficient number, since it is larger than the sum of its proper divisors (76806675).

230420013 is an equidigital number, since it uses as much as digits as its factorization.

230420013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76806674.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 230420013 is about 15179.5919905642. The cubic root of 230420013 is about 613.0652955753.

Adding to 230420013 its reverse (310024032), we get a palindrome (540444045).

The spelling of 230420013 in words is "two hundred thirty million, four hundred twenty thousand, thirteen".

Divisors: 1 3 76806671 230420013