23012139 has 4 divisors (see below), whose sum is σ = 30682856. Its totient is φ = 15341424.

The previous prime is 23012117. The next prime is 23012149. The reversal of 23012139 is 93121032.

It is a happy number.

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

It is not a de Polignac number, because 23012139 - 2⁸ = 23011883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23012149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3835354 + ... + 3835359.

It is an arithmetic number, because the mean of its divisors is an integer number (7670714).

Almost surely, 2^23012139 is an apocalyptic number.

23012139 is a deficient number, since it is larger than the sum of its proper divisors (7670717).

23012139 is an equidigital number, since it uses as much as digits as its factorization.

23012139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7670716.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 23012139 is about 4797.0969346053. The cubic root of 23012139 is about 284.4367206369.

The spelling of 23012139 in words is "twenty-three million, twelve thousand, one hundred thirty-nine".