25880917 has 2 divisors, whose sum is σ = 25880918. Its totient is φ = 25880916.

The previous prime is 25880903. The next prime is 25880923. The reversal of 25880917 is 71908852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24265476 + 1615441 = 4926^2 + 1271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25880917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25880917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25880017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12940458 + 12940459.

It is an arithmetic number, because the mean of its divisors is an integer number (12940459).

Almost surely, 2^25880917 is an apocalyptic number.

It is an amenable number.

25880917 is a deficient number, since it is larger than the sum of its proper divisors (1).

25880917 is an equidigital number, since it uses as much as digits as its factorization.

25880917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 25880917 is about 5087.3290634674. The cubic root of 25880917 is about 295.7966287773.

The spelling of 25880917 in words is "twenty-five million, eight hundred eighty thousand, nine hundred seventeen".