25907987 has 4 divisors (see below), whose sum is σ = 29609136. Its totient is φ = 22206840.

The previous prime is 25907927. The next prime is 25907993. The reversal of 25907987 is 78970952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25907987 - 2⁸ = 25907731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25907927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1850564 + ... + 1850577.

It is an arithmetic number, because the mean of its divisors is an integer number (7402284).

Almost surely, 2^25907987 is an apocalyptic number.

25907987 is a deficient number, since it is larger than the sum of its proper divisors (3701149).

25907987 is an equidigital number, since it uses as much as digits as its factorization.

25907987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701148.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 25907987 is about 5089.9888997914. The cubic root of 25907987 is about 295.8997217842.

The spelling of 25907987 in words is "twenty-five million, nine hundred seven thousand, nine hundred eighty-seven".