25552979 has 4 divisors (see below), whose sum is σ = 25787520. Its totient is φ = 25318440.

The previous prime is 25552951. The next prime is 25552997. The reversal of 25552979 is 97925552.

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 25552979 - 2¹⁶ = 25487443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25552949) 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, 117107 + ... + 117324.

It is an arithmetic number, because the mean of its divisors is an integer number (6446880).

Almost surely, 2^25552979 is an apocalyptic number.

25552979 is a deficient number, since it is larger than the sum of its proper divisors (234541).

25552979 is a wasteful number, since it uses less digits than its factorization.

25552979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234540.

The product of its digits is 283500, while the sum is 44.

The square root of 25552979 is about 5054.9954500474. The cubic root of 25552979 is about 294.5419646704.

The spelling of 25552979 in words is "twenty-five million, five hundred fifty-two thousand, nine hundred seventy-nine".