25479969 has 16 divisors (see below), whose sum is σ = 36526080. Its totient is φ = 15748560.

The previous prime is 25479967. The next prime is 25480027. The reversal of 25479969 is 96997452.

It is not a de Polignac number, because 25479969 - 2¹ = 25479967 is a prime.

It is a super-2 number, since 2×25479969² = 1298457640481922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25479967) 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, 2077 + ... + 7434.

It is an arithmetic number, because the mean of its divisors is an integer number (2282880).

Almost surely, 2^25479969 is an apocalyptic number.

It is an amenable number.

25479969 is a deficient number, since it is larger than the sum of its proper divisors (11046111).

25479969 is a wasteful number, since it uses less digits than its factorization.

25479969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9580.

The product of its digits is 1224720, while the sum is 51.

The square root of 25479969 is about 5047.7687149869. The cubic root of 25479969 is about 294.2611752000.

The spelling of 25479969 in words is "twenty-five million, four hundred seventy-nine thousand, nine hundred sixty-nine".