23499779 has 2 divisors, whose sum is σ = 23499780. Its totient is φ = 23499778.

The previous prime is 23499769. The next prime is 23499787. The reversal of 23499779 is 97799432.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23499779 - 2²⁴ = 6722563 is a prime.

It is a super-2 number, since 2×23499779² = 1104479226097682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23499719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11749889 + 11749890.

It is an arithmetic number, because the mean of its divisors is an integer number (11749890).

Almost surely, 2^23499779 is an apocalyptic number.

23499779 is a deficient number, since it is larger than the sum of its proper divisors (1).

23499779 is an equidigital number, since it uses as much as digits as its factorization.

23499779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 50.

The square root of 23499779 is about 4847.6570629532. The cubic root of 23499779 is about 286.4318179008.

The spelling of 23499779 in words is "twenty-three million, four hundred ninety-nine thousand, seven hundred seventy-nine".