25929881 has 2 divisors, whose sum is σ = 25929882. Its totient is φ = 25929880.

The previous prime is 25929833. The next prime is 25929887. The reversal of 25929881 is 18892952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25593481 + 336400 = 5059^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 25929881 - 2¹⁸ = 25667737 is a prime.

It is a super-2 number, since 2×25929881² = 1344717457348322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25929887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12964940 + 12964941.

It is an arithmetic number, because the mean of its divisors is an integer number (12964941).

Almost surely, 2^25929881 is an apocalyptic number.

It is an amenable number.

25929881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25929881 is an equidigital number, since it uses as much as digits as its factorization.

25929881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 25929881 is about 5092.1391379262. The cubic root of 25929881 is about 295.9830500703.

The spelling of 25929881 in words is "twenty-five million, nine hundred twenty-nine thousand, eight hundred eighty-one".