25979779 has 8 divisors (see below), whose sum is σ = 29736288. Its totient is φ = 22234560.

The previous prime is 25979771. The next prime is 25979813. The reversal of 25979779 is 97797952.

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

It is a cyclic number.

It is not a de Polignac number, because 25979779 - 2³ = 25979771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25979771) 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, 2889 + ... + 7765.

It is an arithmetic number, because the mean of its divisors is an integer number (3717036).

Almost surely, 2^25979779 is an apocalyptic number.

25979779 is a deficient number, since it is larger than the sum of its proper divisors (3756509).

25979779 is an equidigital number, since it uses as much as digits as its factorization.

25979779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5645.

The product of its digits is 2500470, while the sum is 55.

The square root of 25979779 is about 5097.0362957311. The cubic root of 25979779 is about 296.1727861105.

The spelling of 25979779 in words is "twenty-five million, nine hundred seventy-nine thousand, seven hundred seventy-nine".