23439651979 has 4 divisors (see below), whose sum is σ = 23760743176. Its totient is φ = 23118560784.

The previous prime is 23439651973. The next prime is 23439651997. The reversal of 23439651979 is 97915693432.

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 23439651979 - 2⁵ = 23439651947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23439651973) 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, 160545489 + ... + 160545634.

It is an arithmetic number, because the mean of its divisors is an integer number (5940185794).

Almost surely, 2^23439651979 is an apocalyptic number.

23439651979 is a deficient number, since it is larger than the sum of its proper divisors (321091197).

23439651979 is an equidigital number, since it uses as much as digits as its factorization.

23439651979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321091196.

The product of its digits is 11022480, while the sum is 58.

The spelling of 23439651979 in words is "twenty-three billion, four hundred thirty-nine million, six hundred fifty-one thousand, nine hundred seventy-nine".