25997939 has 12 divisors (see below), whose sum is σ = 29353632. Its totient is φ = 22991760.

The previous prime is 25997927. The next prime is 25997941. The reversal of 25997939 is 93979952.

It is not a de Polignac number, because 25997939 - 2²⁰ = 24949363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25997969) 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 in 11 ways as a sum of consecutive naturals, for example, 1574 + ... + 7380.

It is an arithmetic number, because the mean of its divisors is an integer number (2446136).

Almost surely, 2^25997939 is an apocalyptic number.

25997939 is a deficient number, since it is larger than the sum of its proper divisors (3355693).

25997939 is a wasteful number, since it uses less digits than its factorization.

25997939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5866 (or 5855 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 53.

The square root of 25997939 is about 5098.8174119103. The cubic root of 25997939 is about 296.2417788077.

The spelling of 25997939 in words is "twenty-five million, nine hundred ninety-seven thousand, nine hundred thirty-nine".