25979507 has 2 divisors, whose sum is σ = 25979508. Its totient is φ = 25979506.

The previous prime is 25979497. The next prime is 25979521. The reversal of 25979507 is 70597952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25979507 - 2¹⁴ = 25963123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25979207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12989753 + 12989754.

It is an arithmetic number, because the mean of its divisors is an integer number (12989754).

Almost surely, 2^25979507 is an apocalyptic number.

25979507 is a deficient number, since it is larger than the sum of its proper divisors (1).

25979507 is an equidigital number, since it uses as much as digits as its factorization.

25979507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 198450, while the sum is 44.

The square root of 25979507 is about 5097.0096134891. The cubic root of 25979507 is about 296.1717524953.

The spelling of 25979507 in words is "twenty-five million, nine hundred seventy-nine thousand, five hundred seven".