25678799 has 2 divisors, whose sum is σ = 25678800. Its totient is φ = 25678798.

The previous prime is 25678781. The next prime is 25678801. The reversal of 25678799 is 99787652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25678799 - 2¹² = 25674703 is a prime.

Together with 25678801, 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 25678799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25678739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12839399 + 12839400.

It is an arithmetic number, because the mean of its divisors is an integer number (12839400).

Almost surely, 2^25678799 is an apocalyptic number.

25678799 is a deficient number, since it is larger than the sum of its proper divisors (1).

25678799 is an equidigital number, since it uses as much as digits as its factorization.

25678799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 25678799 is about 5067.4252831196. The cubic root of 25678799 is about 295.0246039040.

The spelling of 25678799 in words is "twenty-five million, six hundred seventy-eight thousand, seven hundred ninety-nine".