25965977 has 2 divisors, whose sum is σ = 25965978. Its totient is φ = 25965976.

The previous prime is 25965943. The next prime is 25965983. The reversal of 25965977 is 77956952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24840256 + 1125721 = 4984^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 25965977 - 2⁸ = 25965721 is a prime.

It is not a weakly prime, because it can be changed into another prime (25965377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12982988 + 12982989.

It is an arithmetic number, because the mean of its divisors is an integer number (12982989).

Almost surely, 2^25965977 is an apocalyptic number.

It is an amenable number.

25965977 is a deficient number, since it is larger than the sum of its proper divisors (1).

25965977 is an equidigital number, since it uses as much as digits as its factorization.

25965977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 50.

The square root of 25965977 is about 5095.6821918169. The cubic root of 25965977 is about 296.1203286345.

The spelling of 25965977 in words is "twenty-five million, nine hundred sixty-five thousand, nine hundred seventy-seven".