25617079 has 4 divisors (see below), whose sum is σ = 27123984. Its totient is φ = 24110176.

The previous prime is 25617041. The next prime is 25617103. The reversal of 25617079 is 97071652.

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 25617079 - 2⁷ = 25616951 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 (25617019) 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, 753427 + ... + 753460.

It is an arithmetic number, because the mean of its divisors is an integer number (6780996).

Almost surely, 2^25617079 is an apocalyptic number.

25617079 is a deficient number, since it is larger than the sum of its proper divisors (1506905).

25617079 is a wasteful number, since it uses less digits than its factorization.

25617079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506904.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 25617079 is about 5061.3317417454. The cubic root of 25617079 is about 294.7880465443.

It can be divided in two parts, 2561707 and 9, that added together give a triangular number (2561716 = T₂₂₆₃).

The spelling of 25617079 in words is "twenty-five million, six hundred seventeen thousand, seventy-nine".