13023431 has 4 divisors (see below), whose sum is σ = 13036152. Its totient is φ = 13010712.

The previous prime is 13023427. The next prime is 13023433. The reversal of 13023431 is 13432031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13023431 - 2² = 13023427 is a prime.

It is a super-2 number, since 2×13023431² = 339219510023522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023433) 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, 4676 + ... + 6921.

It is an arithmetic number, because the mean of its divisors is an integer number (3259038).

Almost surely, 2^13023431 is an apocalyptic number.

13023431 is a deficient number, since it is larger than the sum of its proper divisors (12721).

13023431 is a wasteful number, since it uses less digits than its factorization.

13023431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12720.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 13023431 is about 3608.7991077365. The cubic root of 13023431 is about 235.2746509667.

Adding to 13023431 its reverse (13432031), we get a palindrome (26455462).

The spelling of 13023431 in words is "thirteen million, twenty-three thousand, four hundred thirty-one".