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130123023 = 343374341
BaseRepresentation
bin1111100000110…
…00010100001111
3100001211221020020
413300120110033
5231302414043
620524553223
73140012262
oct760302417
9301757206
10130123023
11674a6398
12376b2813
1320c5c794
14133d2cd9
15b654e83
hex7c1850f

130123023 has 4 divisors (see below), whose sum is σ = 173497368. Its totient is φ = 86748680.

The previous prime is 130123009. The next prime is 130123061. The reversal of 130123023 is 320321031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320321031 = 3106773677.

It is a cyclic number.

It is not a de Polignac number, because 130123023 - 26 = 130122959 is a prime.

It is a super-2 number, since 2×1301230232 = 33864002229317058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 130122993 and 130123011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130121023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21687168 + ... + 21687173.

It is an arithmetic number, because the mean of its divisors is an integer number (43374342).

Almost surely, 2130123023 is an apocalyptic number.

130123023 is a deficient number, since it is larger than the sum of its proper divisors (43374345).

130123023 is an equidigital number, since it uses as much as digits as its factorization.

130123023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43374344.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 130123023 is about 11407.1478906868. The cubic root of 130123023 is about 506.7394488492.

Adding to 130123023 its reverse (320321031), we get a palindrome (450444054).

The spelling of 130123023 in words is "one hundred thirty million, one hundred twenty-three thousand, twenty-three".

Divisors: 1 3 43374341 130123023