25190917 has 2 divisors, whose sum is σ = 25190918. Its totient is φ = 25190916.

The previous prime is 25190897. The next prime is 25190947. The reversal of 25190917 is 71909152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24740676 + 450241 = 4974^2 + 671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25190917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25190947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12595458 + 12595459.

It is an arithmetic number, because the mean of its divisors is an integer number (12595459).

Almost surely, 2^25190917 is an apocalyptic number.

It is an amenable number.

25190917 is a deficient number, since it is larger than the sum of its proper divisors (1).

25190917 is an equidigital number, since it uses as much as digits as its factorization.

25190917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 25190917 is about 5019.0553892142. The cubic root of 25190917 is about 293.1442133514.

The spelling of 25190917 in words is "twenty-five million, one hundred ninety thousand, nine hundred seventeen".