25921967 has 2 divisors, whose sum is σ = 25921968. Its totient is φ = 25921966.

The previous prime is 25921919. The next prime is 25921997. The reversal of 25921967 is 76912952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25921967 - 2⁸ = 25921711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25921997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12960983 + 12960984.

It is an arithmetic number, because the mean of its divisors is an integer number (12960984).

Almost surely, 2^25921967 is an apocalyptic number.

25921967 is a deficient number, since it is larger than the sum of its proper divisors (1).

25921967 is an equidigital number, since it uses as much as digits as its factorization.

25921967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 25921967 is about 5091.3619985226. The cubic root of 25921967 is about 295.9529349018.

The spelling of 25921967 in words is "twenty-five million, nine hundred twenty-one thousand, nine hundred sixty-seven".