23978077 has 2 divisors, whose sum is σ = 23978078. Its totient is φ = 23978076.

The previous prime is 23978069. The next prime is 23978093. The reversal of 23978077 is 77087932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 11909401 = 3474^2 + 3451^2 .

It is a cyclic number.

It is not a de Polignac number, because 23978077 - 2³ = 23978069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23978377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11989038 + 11989039.

It is an arithmetic number, because the mean of its divisors is an integer number (11989039).

Almost surely, 2^23978077 is an apocalyptic number.

It is an amenable number.

23978077 is a deficient number, since it is larger than the sum of its proper divisors (1).

23978077 is an equidigital number, since it uses as much as digits as its factorization.

23978077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 23978077 is about 4896.7414675476. The cubic root of 23978077 is about 288.3620583126.

The spelling of 23978077 in words is "twenty-three million, nine hundred seventy-eight thousand, seventy-seven".