23439971 has 4 divisors (see below), whose sum is σ = 23476200. Its totient is φ = 23403744.

The previous prime is 23439919. The next prime is 23440003. The reversal of 23439971 is 17993432.

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 23439971 - 2¹⁸ = 23177827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23439071) 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, 17126 + ... + 18443.

It is an arithmetic number, because the mean of its divisors is an integer number (5869050).

Almost surely, 2^23439971 is an apocalyptic number.

23439971 is a deficient number, since it is larger than the sum of its proper divisors (36229).

23439971 is an equidigital number, since it uses as much as digits as its factorization.

23439971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36228.

The product of its digits is 40824, while the sum is 38.

The square root of 23439971 is about 4841.4843798158. The cubic root of 23439971 is about 286.1886174899.

The spelling of 23439971 in words is "twenty-three million, four hundred thirty-nine thousand, nine hundred seventy-one".