23978711 has 2 divisors, whose sum is σ = 23978712. Its totient is φ = 23978710.

The previous prime is 23978707. The next prime is 23978749. The reversal of 23978711 is 11787932.

It is an a-pointer prime, because the next prime (23978749) can be obtained adding 23978711 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23978711 - 2² = 23978707 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23978761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11989355 + 11989356.

It is an arithmetic number, because the mean of its divisors is an integer number (11989356).

Almost surely, 2^23978711 is an apocalyptic number.

23978711 is a deficient number, since it is larger than the sum of its proper divisors (1).

23978711 is an equidigital number, since it uses as much as digits as its factorization.

23978711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 38.

The square root of 23978711 is about 4896.8062040477. The cubic root of 23978711 is about 288.3645997999.

The spelling of 23978711 in words is "twenty-three million, nine hundred seventy-eight thousand, seven hundred eleven".