25877997 has 6 divisors (see below), whose sum is σ = 37379342. Its totient is φ = 17251992.

The previous prime is 25877993. The next prime is 25878037. The reversal of 25877997 is 79977852.

It can be written as a sum of positive squares in only one way, i.e., 14243076 + 11634921 = 3774^2 + 3411^2 .

It is not a de Polignac number, because 25877997 - 2² = 25877993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25877993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1437658 + ... + 1437675.

Almost surely, 2^25877997 is an apocalyptic number.

It is an amenable number.

25877997 is a deficient number, since it is larger than the sum of its proper divisors (11501345).

25877997 is a wasteful number, since it uses less digits than its factorization.

25877997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875339 (or 2875336 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 25877997 is about 5087.0420678426. The cubic root of 25877997 is about 295.7855039958.

The spelling of 25877997 in words is "twenty-five million, eight hundred seventy-seven thousand, nine hundred ninety-seven".