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230023391 = 1323769309
BaseRepresentation
bin11011011010111…
…10000011011111
3121000211101202212
431231132003133
5432341222031
634454111035
75462111063
oct1555360337
9530741685
10230023391
11108929a84
126504b47b
1338869b20
1422799aa3
15152da12b
hexdb5e0df

230023391 has 8 divisors (see below), whose sum is σ = 258488160. Its totient is φ = 203097312.

The previous prime is 230023351. The next prime is 230023393. The reversal of 230023391 is 193320032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 230023391 - 210 = 230022367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230023393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384356 + ... + 384953.

It is an arithmetic number, because the mean of its divisors is an integer number (32311020).

Almost surely, 2230023391 is an apocalyptic number.

230023391 is a deficient number, since it is larger than the sum of its proper divisors (28464769).

230023391 is a wasteful number, since it uses less digits than its factorization.

230023391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769345.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 230023391 is about 15166.5220469295. The cubic root of 230023391 is about 612.7133370968.

The spelling of 230023391 in words is "two hundred thirty million, twenty-three thousand, three hundred ninety-one".

Divisors: 1 13 23 299 769309 10001017 17694107 230023391