25634779 has 2 divisors, whose sum is σ = 25634780. Its totient is φ = 25634778.

The previous prime is 25634773. The next prime is 25634801. The reversal of 25634779 is 97743652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25634779 - 2³ = 25634771 is a prime.

It is not a weakly prime, because it can be changed into another prime (25634771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12817389 + 12817390.

It is an arithmetic number, because the mean of its divisors is an integer number (12817390).

Almost surely, 2^25634779 is an apocalyptic number.

25634779 is a deficient number, since it is larger than the sum of its proper divisors (1).

25634779 is an equidigital number, since it uses as much as digits as its factorization.

25634779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 43.

The square root of 25634779 is about 5063.0799914676. The cubic root of 25634779 is about 294.8559250504.

The spelling of 25634779 in words is "twenty-five million, six hundred thirty-four thousand, seven hundred seventy-nine".