25966987 has 2 divisors, whose sum is σ = 25966988. Its totient is φ = 25966986.

The previous prime is 25966957. The next prime is 25967003. The reversal of 25966987 is 78966952.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25966987 is a prime.

It is not a weakly prime, because it can be changed into another prime (25966937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12983493 + 12983494.

It is an arithmetic number, because the mean of its divisors is an integer number (12983494).

Almost surely, 2^25966987 is an apocalyptic number.

25966987 is a deficient number, since it is larger than the sum of its proper divisors (1).

25966987 is an equidigital number, since it uses as much as digits as its factorization.

25966987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 25966987 is about 5095.7812943650. The cubic root of 25966987 is about 296.1241679875.

The spelling of 25966987 in words is "twenty-five million, nine hundred sixty-six thousand, nine hundred eighty-seven".