23279939 has 2 divisors, whose sum is σ = 23279940. Its totient is φ = 23279938.

The previous prime is 23279917. The next prime is 23279941. The reversal of 23279939 is 93997232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23279939 - 2¹⁶ = 23214403 is a prime.

Together with 23279941, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23279939.

It is not a weakly prime, because it can be changed into another prime (23272939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11639969 + 11639970.

It is an arithmetic number, because the mean of its divisors is an integer number (11639970).

Almost surely, 2^23279939 is an apocalyptic number.

23279939 is a deficient number, since it is larger than the sum of its proper divisors (1).

23279939 is an equidigital number, since it uses as much as digits as its factorization.

23279939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 44.

The square root of 23279939 is about 4824.9289113934. The cubic root of 23279939 is about 285.5358299535.

The spelling of 23279939 in words is "twenty-three million, two hundred seventy-nine thousand, nine hundred thirty-nine".