25974899 has 2 divisors, whose sum is σ = 25974900. Its totient is φ = 25974898.

The previous prime is 25974887. The next prime is 25974901. The reversal of 25974899 is 99847952.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25974899 is a prime.

Together with 25974901, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25974899.

It is not a weakly prime, because it can be changed into another prime (25974829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12987449 + 12987450.

It is an arithmetic number, because the mean of its divisors is an integer number (12987450).

Almost surely, 2^25974899 is an apocalyptic number.

25974899 is a deficient number, since it is larger than the sum of its proper divisors (1).

25974899 is an equidigital number, since it uses as much as digits as its factorization.

25974899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 25974899 is about 5096.5575636894. The cubic root of 25974899 is about 296.1542407423.

The spelling of 25974899 in words is "twenty-five million, nine hundred seventy-four thousand, eight hundred ninety-nine".