23779997 has 2 divisors, whose sum is σ = 23779998. Its totient is φ = 23779996.

The previous prime is 23779967. The next prime is 23780017. The reversal of 23779997 is 79997732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16736281 + 7043716 = 4091^2 + 2654^2 .

It is a cyclic number.

It is not a de Polignac number, because 23779997 - 2⁸ = 23779741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23779967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11889998 + 11889999.

It is an arithmetic number, because the mean of its divisors is an integer number (11889999).

Almost surely, 2^23779997 is an apocalyptic number.

It is an amenable number.

23779997 is a deficient number, since it is larger than the sum of its proper divisors (1).

23779997 is an equidigital number, since it uses as much as digits as its factorization.

23779997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500282, while the sum is 53.

The square root of 23779997 is about 4876.4738284953. The cubic root of 23779997 is about 287.5658203426.

The spelling of 23779997 in words is "twenty-three million, seven hundred seventy-nine thousand, nine hundred ninety-seven".