25437539 has 2 divisors, whose sum is σ = 25437540. Its totient is φ = 25437538.

The previous prime is 25437521. The next prime is 25437541. The reversal of 25437539 is 93573452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25437539 - 2⁸ = 25437283 is a prime.

It is a Sophie Germain prime.

Together with 25437541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25437569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12718769 + 12718770.

It is an arithmetic number, because the mean of its divisors is an integer number (12718770).

Almost surely, 2^25437539 is an apocalyptic number.

25437539 is a deficient number, since it is larger than the sum of its proper divisors (1).

25437539 is an equidigital number, since it uses as much as digits as its factorization.

25437539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 38.

The square root of 25437539 is about 5043.5641167730. The cubic root of 25437539 is about 294.0977469728.

The spelling of 25437539 in words is "twenty-five million, four hundred thirty-seven thousand, five hundred thirty-nine".