25017887 has 2 divisors, whose sum is σ = 25017888. Its totient is φ = 25017886.

The previous prime is 25017871. The next prime is 25017893. The reversal of 25017887 is 78871052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25017887 - 2⁴ = 25017871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25017887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25011887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12508943 + 12508944.

It is an arithmetic number, because the mean of its divisors is an integer number (12508944).

Almost surely, 2^25017887 is an apocalyptic number.

25017887 is a deficient number, since it is larger than the sum of its proper divisors (1).

25017887 is an equidigital number, since it uses as much as digits as its factorization.

25017887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 25017887 is about 5001.7883801696. The cubic root of 25017887 is about 292.4714930701.

The spelling of 25017887 in words is "twenty-five million, seventeen thousand, eight hundred eighty-seven".