25667969 has 16 divisors (see below), whose sum is σ = 27525120. Its totient is φ = 23896080.

The previous prime is 25667933. The next prime is 25667989. The reversal of 25667969 is 96976652.

It is a cyclic number.

It is not a de Polignac number, because 25667969 - 2⁸ = 25667713 is a prime.

It is a super-2 number, since 2×25667969² = 1317689265169922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25667989) 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 15 ways as a sum of consecutive naturals, for example, 114992 + ... + 115214.

It is an arithmetic number, because the mean of its divisors is an integer number (1720320).

Almost surely, 2^25667969 is an apocalyptic number.

It is an amenable number.

25667969 is a deficient number, since it is larger than the sum of its proper divisors (1857151).

25667969 is a wasteful number, since it uses less digits than its factorization.

25667969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380.

The product of its digits is 1224720, while the sum is 50.

The square root of 25667969 is about 5066.3565804235. The cubic root of 25667969 is about 294.9831226579.

The spelling of 25667969 in words is "twenty-five million, six hundred sixty-seven thousand, nine hundred sixty-nine".