25916939 has 2 divisors, whose sum is σ = 25916940. Its totient is φ = 25916938.

The previous prime is 25916843. The next prime is 25916941. The reversal of 25916939 is 93961952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25916939 - 2²⁴ = 9139723 is a prime.

Together with 25916941, 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 25916939.

It is not a weakly prime, because it can be changed into another prime (25916039) 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, 12958469 + 12958470.

It is an arithmetic number, because the mean of its divisors is an integer number (12958470).

Almost surely, 2^25916939 is an apocalyptic number.

25916939 is a deficient number, since it is larger than the sum of its proper divisors (1).

25916939 is an equidigital number, since it uses as much as digits as its factorization.

25916939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 44.

The square root of 25916939 is about 5090.8681970760. The cubic root of 25916939 is about 295.9337986537.

The spelling of 25916939 in words is "twenty-five million, nine hundred sixteen thousand, nine hundred thirty-nine".