25979963 has 2 divisors, whose sum is σ = 25979964. Its totient is φ = 25979962.

The previous prime is 25979959. The next prime is 25979981. The reversal of 25979963 is 36997952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25979963 - 2² = 25979959 is a prime.

It is not a weakly prime, because it can be changed into another prime (25978963) 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, 12989981 + 12989982.

It is an arithmetic number, because the mean of its divisors is an integer number (12989982).

Almost surely, 2^25979963 is an apocalyptic number.

25979963 is a deficient number, since it is larger than the sum of its proper divisors (1).

25979963 is an equidigital number, since it uses as much as digits as its factorization.

25979963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 50.

The square root of 25979963 is about 5097.0543454038. The cubic root of 25979963 is about 296.1734853166.

The spelling of 25979963 in words is "twenty-five million, nine hundred seventy-nine thousand, nine hundred sixty-three".