123013431 has 16 divisors (see below), whose sum is σ = 182930400. Its totient is φ = 81699264.

The previous prime is 123013421. The next prime is 123013433. The reversal of 123013431 is 134310321.

123013431 is a `hidden beast` number, since 1 + 230 + 1 + 3 + 431 = 666.

It is not a de Polignac number, because 123013431 - 2⁵ = 123013399 is a prime.

It is a super-2 number, since 2×123013431² = 30264608412783522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123013433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206 + ... + 15731.

It is an arithmetic number, because the mean of its divisors is an integer number (11433150).

Almost surely, 2^123013431 is an apocalyptic number.

123013431 is a deficient number, since it is larger than the sum of its proper divisors (59916969).

123013431 is a wasteful number, since it uses less digits than its factorization.

123013431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17215 (or 17209 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 123013431 is about 11091.1420061236. The cubic root of 123013431 is about 497.3370842704.

Adding to 123013431 its reverse (134310321), we get a palindrome (257323752).

The spelling of 123013431 in words is "one hundred twenty-three million, thirteen thousand, four hundred thirty-one".