25990979 has 8 divisors (see below), whose sum is σ = 29871360. Its totient is φ = 22152456.

The previous prime is 25990973. The next prime is 25990981. The reversal of 25990979 is 97909952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25990979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25990973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9119 + ... + 11624.

It is an arithmetic number, because the mean of its divisors is an integer number (3733920).

Almost surely, 2^25990979 is an apocalyptic number.

25990979 is a deficient number, since it is larger than the sum of its proper divisors (3880381).

25990979 is a wasteful number, since it uses less digits than its factorization.

25990979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20929.

The product of its (nonzero) digits is 459270, while the sum is 50.

The square root of 25990979 is about 5098.1348550230. The cubic root of 25990979 is about 296.2153404709.

The spelling of 25990979 in words is "twenty-five million, nine hundred ninety thousand, nine hundred seventy-nine".