25457899 has 2 divisors, whose sum is σ = 25457900. Its totient is φ = 25457898.

The previous prime is 25457897. The next prime is 25457921. The reversal of 25457899 is 99875452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25457899 - 2¹ = 25457897 is a prime.

Together with 25457897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25457893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12728949 + 12728950.

It is an arithmetic number, because the mean of its divisors is an integer number (12728950).

Almost surely, 2^25457899 is an apocalyptic number.

25457899 is a deficient number, since it is larger than the sum of its proper divisors (1).

25457899 is an equidigital number, since it uses as much as digits as its factorization.

25457899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 49.

The square root of 25457899 is about 5045.5821269701. The cubic root of 25457899 is about 294.1761905322.

The spelling of 25457899 in words is "twenty-five million, four hundred fifty-seven thousand, eight hundred ninety-nine".