25696613 has 4 divisors (see below), whose sum is σ = 26525568. Its totient is φ = 24867660.

The previous prime is 25696597. The next prime is 25696633. The reversal of 25696613 is 31669652.

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 25696613 - 2⁴ = 25696597 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 (25696633) 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, 414431 + ... + 414492.

It is an arithmetic number, because the mean of its divisors is an integer number (6631392).

Almost surely, 2^25696613 is an apocalyptic number.

It is an amenable number.

25696613 is a deficient number, since it is larger than the sum of its proper divisors (828955).

25696613 is an equidigital number, since it uses as much as digits as its factorization.

25696613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828954.

The product of its digits is 58320, while the sum is 38.

The square root of 25696613 is about 5069.1826757378. The cubic root of 25696613 is about 295.0928100204.

It can be divided in two parts, 256 and 96613, that added together give a palindrome (96869).

The spelling of 25696613 in words is "twenty-five million, six hundred ninety-six thousand, six hundred thirteen".