25879717 has 2 divisors, whose sum is σ = 25879718. Its totient is φ = 25879716.

The previous prime is 25879709. The next prime is 25879727. The reversal of 25879717 is 71797852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25867396 + 12321 = 5086^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 25879717 - 2³ = 25879709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25879727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12939858 + 12939859.

It is an arithmetic number, because the mean of its divisors is an integer number (12939859).

Almost surely, 2^25879717 is an apocalyptic number.

It is an amenable number.

25879717 is a deficient number, since it is larger than the sum of its proper divisors (1).

25879717 is an equidigital number, since it uses as much as digits as its factorization.

25879717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 46.

The square root of 25879717 is about 5087.2111220196. The cubic root of 25879717 is about 295.7920570506.

The spelling of 25879717 in words is "twenty-five million, eight hundred seventy-nine thousand, seven hundred seventeen".