25978079 has 4 divisors (see below), whose sum is σ = 26216520. Its totient is φ = 25739640.

The previous prime is 25978049. The next prime is 25978097. The reversal of 25978079 is 97087952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25978079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25978039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119057 + ... + 119274.

It is an arithmetic number, because the mean of its divisors is an integer number (6554130).

Almost surely, 2^25978079 is an apocalyptic number.

25978079 is a deficient number, since it is larger than the sum of its proper divisors (238441).

25978079 is a wasteful number, since it uses less digits than its factorization.

25978079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238440.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 25978079 is about 5096.8695294269. The cubic root of 25978079 is about 296.1663258975.

The spelling of 25978079 in words is "twenty-five million, nine hundred seventy-eight thousand, seventy-nine".