25778959 has 2 divisors, whose sum is σ = 25778960. Its totient is φ = 25778958.

The previous prime is 25778957. The next prime is 25778969. The reversal of 25778959 is 95987752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25778959 - 2¹ = 25778957 is a prime.

Together with 25778957, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25778957) 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, 12889479 + 12889480.

It is an arithmetic number, because the mean of its divisors is an integer number (12889480).

Almost surely, 2^25778959 is an apocalyptic number.

25778959 is a deficient number, since it is larger than the sum of its proper divisors (1).

25778959 is an equidigital number, since it uses as much as digits as its factorization.

25778959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 52.

The square root of 25778959 is about 5077.2983958007. The cubic root of 25778959 is about 295.4076868244.

The spelling of 25778959 in words is "twenty-five million, seven hundred seventy-eight thousand, nine hundred fifty-nine".