25579697 has 16 divisors (see below), whose sum is σ = 30336768. Its totient is φ = 21262080.

The previous prime is 25579669. The next prime is 25579709. The reversal of 25579697 is 79697552.

It is not a de Polignac number, because 25579697 - 2⁶ = 25579633 is a prime.

It is a super-2 number, since 2×25579697² = 1308641797223618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25579397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15368 + ... + 16950.

It is an arithmetic number, because the mean of its divisors is an integer number (1896048).

Almost surely, 2^25579697 is an apocalyptic number.

It is an amenable number.

25579697 is a deficient number, since it is larger than the sum of its proper divisors (4757071).

25579697 is a wasteful number, since it uses less digits than its factorization.

25579697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720.

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

The square root of 25579697 is about 5057.6374919521. The cubic root of 25579697 is about 294.6445858561.

The spelling of 25579697 in words is "twenty-five million, five hundred seventy-nine thousand, six hundred ninety-seven".