25580913 has 4 divisors (see below), whose sum is σ = 34107888. Its totient is φ = 17053940.

The previous prime is 25580909. The next prime is 25580917. The reversal of 25580913 is 31908552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (25580909) and next prime (25580917).

It is a cyclic number.

It is not a de Polignac number, because 25580913 - 2² = 25580909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25580917) 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, 4263483 + ... + 4263488.

It is an arithmetic number, because the mean of its divisors is an integer number (8526972).

Almost surely, 2^25580913 is an apocalyptic number.

It is an amenable number.

25580913 is a deficient number, since it is larger than the sum of its proper divisors (8526975).

25580913 is an equidigital number, since it uses as much as digits as its factorization.

25580913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8526974.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 25580913 is about 5057.7577047542. The cubic root of 25580913 is about 294.6492546909.

The spelling of 25580913 in words is "twenty-five million, five hundred eighty thousand, nine hundred thirteen".