25630497 has 6 divisors (see below), whose sum is σ = 37021842. Its totient is φ = 17086992.

The previous prime is 25630489. The next prime is 25630499. The reversal of 25630497 is 79403652.

25630497 is a `hidden beast` number, since 2 + 563 + 0 + 4 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23824161 + 1806336 = 4881^2 + 1344^2 .

It is not a de Polignac number, because 25630497 - 2³ = 25630489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25630499) 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 in 5 ways as a sum of consecutive naturals, for example, 1423908 + ... + 1423925.

It is an arithmetic number, because the mean of its divisors is an integer number (6170307).

Almost surely, 2^25630497 is an apocalyptic number.

It is an amenable number.

25630497 is a deficient number, since it is larger than the sum of its proper divisors (11391345).

25630497 is a wasteful number, since it uses less digits than its factorization.

25630497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847839 (or 2847836 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 25630497 is about 5062.6571086733. The cubic root of 25630497 is about 294.8395066866.

The spelling of 25630497 in words is "twenty-five million, six hundred thirty thousand, four hundred ninety-seven".