25328913 has 4 divisors (see below), whose sum is σ = 33771888. Its totient is φ = 16885940.

The previous prime is 25328909. The next prime is 25328917. The reversal of 25328913 is 31982352.

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 (25328909) and next prime (25328917).

It is a cyclic number.

It is not a de Polignac number, because 25328913 - 2² = 25328909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25328917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4221483 + ... + 4221488.

It is an arithmetic number, because the mean of its divisors is an integer number (8442972).

Almost surely, 2^25328913 is an apocalyptic number.

It is an amenable number.

25328913 is a deficient number, since it is larger than the sum of its proper divisors (8442975).

25328913 is an equidigital number, since it uses as much as digits as its factorization.

25328913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8442974.

The product of its digits is 12960, while the sum is 33.

The square root of 25328913 is about 5032.7838221008. The cubic root of 25328913 is about 293.6785208306.

The spelling of 25328913 in words is "twenty-five million, three hundred twenty-eight thousand, nine hundred thirteen".