25608013 has 4 divisors (see below), whose sum is σ = 25622460. Its totient is φ = 25593568.

The previous prime is 25607999. The next prime is 25608031. The reversal of 25608013 is 31080652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3452164 + 22155849 = 1858^2 + 4707^2 .

It is a cyclic number.

It is not a de Polignac number, because 25608013 - 2⁹ = 25607501 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 (25608083) 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, 4120 + ... + 8257.

It is an arithmetic number, because the mean of its divisors is an integer number (6405615).

Almost surely, 2^25608013 is an apocalyptic number.

It is an amenable number.

25608013 is a deficient number, since it is larger than the sum of its proper divisors (14447).

25608013 is a wasteful number, since it uses less digits than its factorization.

25608013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14446.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 25608013 is about 5060.4360484053. The cubic root of 25608013 is about 294.7532668339.

Adding to 25608013 its reverse (31080652), we get a palindrome (56688665).

The spelling of 25608013 in words is "twenty-five million, six hundred eight thousand, thirteen".