25660313 has 4 divisors (see below), whose sum is σ = 29326080. Its totient is φ = 21994548.

The previous prime is 25660247. The next prime is 25660319. The reversal of 25660313 is 31306652.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25660313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25660319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1832873 + ... + 1832886.

It is an arithmetic number, because the mean of its divisors is an integer number (7331520).

Almost surely, 2^25660313 is an apocalyptic number.

It is an amenable number.

25660313 is a deficient number, since it is larger than the sum of its proper divisors (3665767).

25660313 is an equidigital number, since it uses as much as digits as its factorization.

25660313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665766.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 25660313 is about 5065.6009515160. The cubic root of 25660313 is about 294.9537914792.

Adding to 25660313 its reverse (31306652), we get a palindrome (56966965).

The spelling of 25660313 in words is "twenty-five million, six hundred sixty thousand, three hundred thirteen".