23039513 has 4 divisors (see below), whose sum is σ = 26330880. Its totient is φ = 19748148.

The previous prime is 23039509. The next prime is 23039531. The reversal of 23039513 is 31593032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23039513 - 2² = 23039509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23039113) 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, 1645673 + ... + 1645686.

It is an arithmetic number, because the mean of its divisors is an integer number (6582720).

Almost surely, 2^23039513 is an apocalyptic number.

It is an amenable number.

23039513 is a deficient number, since it is larger than the sum of its proper divisors (3291367).

23039513 is an equidigital number, since it uses as much as digits as its factorization.

23039513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291366.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 23039513 is about 4799.9492705653. The cubic root of 23039513 is about 284.5494594758.

The spelling of 23039513 in words is "twenty-three million, thirty-nine thousand, five hundred thirteen".