25416979 has 4 divisors (see below), whose sum is σ = 29047984. Its totient is φ = 21785976.

The previous prime is 25416973. The next prime is 25416983. The reversal of 25416979 is 97961452.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25416979 - 2¹⁵ = 25384211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25416973) 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, 1815492 + ... + 1815505.

It is an arithmetic number, because the mean of its divisors is an integer number (7261996).

Almost surely, 2^25416979 is an apocalyptic number.

25416979 is a deficient number, since it is larger than the sum of its proper divisors (3631005).

25416979 is an equidigital number, since it uses as much as digits as its factorization.

25416979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3631004.

The product of its digits is 136080, while the sum is 43.

The square root of 25416979 is about 5041.5254635874. The cubic root of 25416979 is about 294.0184903607.

The spelling of 25416979 in words is "twenty-five million, four hundred sixteen thousand, nine hundred seventy-nine".