25695977 has 2 divisors, whose sum is σ = 25695978. Its totient is φ = 25695976.

The previous prime is 25695973. The next prime is 25696003. The reversal of 25695977 is 77959652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24098281 + 1597696 = 4909^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 25695977 - 2² = 25695973 is a prime.

It is not a weakly prime, because it can be changed into another prime (25695973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12847988 + 12847989.

It is an arithmetic number, because the mean of its divisors is an integer number (12847989).

Almost surely, 2^25695977 is an apocalyptic number.

It is an amenable number.

25695977 is a deficient number, since it is larger than the sum of its proper divisors (1).

25695977 is an equidigital number, since it uses as much as digits as its factorization.

25695977 is an odious number, because the sum of its binary digits is odd.

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

The square root of 25695977 is about 5069.1199433432. The cubic root of 25695977 is about 295.0903754508.

The spelling of 25695977 in words is "twenty-five million, six hundred ninety-five thousand, nine hundred seventy-seven".