25634977 has 2 divisors, whose sum is σ = 25634978. Its totient is φ = 25634976.

The previous prime is 25634909. The next prime is 25635007. The reversal of 25634977 is 77943652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25160256 + 474721 = 5016^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 25634977 - 2¹⁵ = 25602209 is a prime.

It is not a weakly prime, because it can be changed into another prime (25634177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12817488 + 12817489.

It is an arithmetic number, because the mean of its divisors is an integer number (12817489).

Almost surely, 2^25634977 is an apocalyptic number.

It is an amenable number.

25634977 is a deficient number, since it is larger than the sum of its proper divisors (1).

25634977 is an equidigital number, since it uses as much as digits as its factorization.

25634977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 43.

The square root of 25634977 is about 5063.0995447453. The cubic root of 25634977 is about 294.8566841925.

The spelling of 25634977 in words is "twenty-five million, six hundred thirty-four thousand, nine hundred seventy-seven".