25239967 has 2 divisors, whose sum is σ = 25239968. Its totient is φ = 25239966.

The previous prime is 25239959. The next prime is 25239971. The reversal of 25239967 is 76993252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25239967 - 2³ = 25239959 is a prime.

It is a super-2 number, since 2×25239967² = 1274111868322178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25239937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12619983 + 12619984.

It is an arithmetic number, because the mean of its divisors is an integer number (12619984).

Almost surely, 2^25239967 is an apocalyptic number.

25239967 is a deficient number, since it is larger than the sum of its proper divisors (1).

25239967 is an equidigital number, since it uses as much as digits as its factorization.

25239967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 25239967 is about 5023.9393905580. The cubic root of 25239967 is about 293.3343533309.

The spelling of 25239967 in words is "twenty-five million, two hundred thirty-nine thousand, nine hundred sixty-seven".