25397973 has 6 divisors (see below), whose sum is σ = 36685974. Its totient is φ = 16931976.

The previous prime is 25397951. The next prime is 25397987. The reversal of 25397973 is 37979352.

It can be written as a sum of positive squares in only one way, i.e., 16016004 + 9381969 = 4002^2 + 3063^2 .

It is not a de Polignac number, because 25397973 - 2⁶ = 25397909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25397903) 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, 1410990 + ... + 1411007.

It is an arithmetic number, because the mean of its divisors is an integer number (6114329).

Almost surely, 2^25397973 is an apocalyptic number.

It is an amenable number.

25397973 is a deficient number, since it is larger than the sum of its proper divisors (11288001).

25397973 is a wasteful number, since it uses less digits than its factorization.

25397973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822003 (or 2822000 counting only the distinct ones).

The product of its digits is 357210, while the sum is 45.

The square root of 25397973 is about 5039.6401657261. The cubic root of 25397973 is about 293.9451862270.

The spelling of 25397973 in words is "twenty-five million, three hundred ninety-seven thousand, nine hundred seventy-three".