25904987 has 2 divisors, whose sum is σ = 25904988. Its totient is φ = 25904986.

The previous prime is 25904959. The next prime is 25904993. The reversal of 25904987 is 78940952.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25904987 - 2⁸ = 25904731 is a prime.

It is not a weakly prime, because it can be changed into another prime (25904287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12952493 + 12952494.

It is an arithmetic number, because the mean of its divisors is an integer number (12952494).

Almost surely, 2^25904987 is an apocalyptic number.

25904987 is a deficient number, since it is larger than the sum of its proper divisors (1).

25904987 is an equidigital number, since it uses as much as digits as its factorization.

25904987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 25904987 is about 5089.6941951359. The cubic root of 25904987 is about 295.8883001657. Note that the first 3 decimals are identical.

The spelling of 25904987 in words is "twenty-five million, nine hundred four thousand, nine hundred eighty-seven".