25328917 has 2 divisors, whose sum is σ = 25328918. Its totient is φ = 25328916.

The previous prime is 25328909. The next prime is 25328923. The reversal of 25328917 is 71982352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25310961 + 17956 = 5031^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 25328917 - 2³ = 25328909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25328987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12664458 + 12664459.

It is an arithmetic number, because the mean of its divisors is an integer number (12664459).

Almost surely, 2^25328917 is an apocalyptic number.

It is an amenable number.

25328917 is a deficient number, since it is larger than the sum of its proper divisors (1).

25328917 is an equidigital number, since it uses as much as digits as its factorization.

25328917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 25328917 is about 5032.7842194952. The cubic root of 25328917 is about 293.6785362900.

It can be divided in two parts, 2532 and 8917, that added together give a square (11449 = 107²).

The spelling of 25328917 in words is "twenty-five million, three hundred twenty-eight thousand, nine hundred seventeen".