25996387 has 2 divisors, whose sum is σ = 25996388. Its totient is φ = 25996386.

The previous prime is 25996379. The next prime is 25996393. The reversal of 25996387 is 78369952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25996387 - 2³ = 25996379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25996387.

It is not a weakly prime, because it can be changed into another prime (25996307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12998193 + 12998194.

It is an arithmetic number, because the mean of its divisors is an integer number (12998194).

Almost surely, 2^25996387 is an apocalyptic number.

25996387 is a deficient number, since it is larger than the sum of its proper divisors (1).

25996387 is an equidigital number, since it uses as much as digits as its factorization.

25996387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 25996387 is about 5098.6652174858. The cubic root of 25996387 is about 296.2358837713.

The spelling of 25996387 in words is "twenty-five million, nine hundred ninety-six thousand, three hundred eighty-seven".