25394917 has 2 divisors, whose sum is σ = 25394918. Its totient is φ = 25394916.

The previous prime is 25394881. The next prime is 25394927. The reversal of 25394917 is 71949352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23338561 + 2056356 = 4831^2 + 1434^2 .

It is a cyclic number.

It is not a de Polignac number, because 25394917 - 2¹¹ = 25392869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25394917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25394927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12697458 + 12697459.

It is an arithmetic number, because the mean of its divisors is an integer number (12697459).

Almost surely, 2^25394917 is an apocalyptic number.

It is an amenable number.

25394917 is a deficient number, since it is larger than the sum of its proper divisors (1).

25394917 is an equidigital number, since it uses as much as digits as its factorization.

25394917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 25394917 is about 5039.3369603550. The cubic root of 25394917 is about 293.9333961454.

The spelling of 25394917 in words is "twenty-five million, three hundred ninety-four thousand, nine hundred seventeen".