25679489 has 16 divisors (see below), whose sum is σ = 29042496. Its totient is φ = 22502400.

The previous prime is 25679483. The next prime is 25679497. The reversal of 25679489 is 98497652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25679489 - 2⁴ = 25679473 is a prime.

It is a super-2 number, since 2×25679489² = 1318872310602242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25679483) 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, 43454 + ... + 44040.

It is an arithmetic number, because the mean of its divisors is an integer number (1815156).

Almost surely, 2^25679489 is an apocalyptic number.

It is an amenable number.

25679489 is a deficient number, since it is larger than the sum of its proper divisors (3363007).

25679489 is a wasteful number, since it uses less digits than its factorization.

25679489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736.

The product of its digits is 1088640, while the sum is 50.

The square root of 25679489 is about 5067.4933645739. The cubic root of 25679489 is about 295.0272463583.

The spelling of 25679489 in words is "twenty-five million, six hundred seventy-nine thousand, four hundred eighty-nine".