25956613 has 4 divisors (see below), whose sum is σ = 26010400. Its totient is φ = 25902828.

The previous prime is 25956607. The next prime is 25956629. The reversal of 25956613 is 31665952.

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 not a de Polignac number, because 25956613 - 2¹³ = 25948421 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 (25956713) 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, 26163 + ... + 27136.

It is an arithmetic number, because the mean of its divisors is an integer number (6502600).

Almost surely, 2^25956613 is an apocalyptic number.

It is an amenable number.

25956613 is a deficient number, since it is larger than the sum of its proper divisors (53787).

25956613 is an equidigital number, since it uses as much as digits as its factorization.

25956613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53786.

The product of its digits is 48600, while the sum is 37.

The square root of 25956613 is about 5094.7632918517. The cubic root of 25956613 is about 296.0847281492.

It can be divided in two parts, 25956 and 613, that added together give a square (26569 = 163²).

The spelling of 25956613 in words is "twenty-five million, nine hundred fifty-six thousand, six hundred thirteen".