23499431 has 4 divisors (see below), whose sum is σ = 23509200. Its totient is φ = 23489664.

The previous prime is 23499391. The next prime is 23499433. The reversal of 23499431 is 13499432.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23499431 - 2²² = 19305127 is a prime.

It is a super-2 number, since 2×23499431² = 1104446514647522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23499391 and 23499400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23499433) 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, 1550 + ... + 7028.

It is an arithmetic number, because the mean of its divisors is an integer number (5877300).

Almost surely, 2^23499431 is an apocalyptic number.

23499431 is a deficient number, since it is larger than the sum of its proper divisors (9769).

23499431 is an equidigital number, since it uses as much as digits as its factorization.

23499431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9768.

The product of its digits is 23328, while the sum is 35.

The square root of 23499431 is about 4847.6211691922. The cubic root of 23499431 is about 286.4304040044.

Subtracting from 23499431 its reverse (13499432), we obtain a palindrome (9999999).

The spelling of 23499431 in words is "twenty-three million, four hundred ninety-nine thousand, four hundred thirty-one".