25557079 has 2 divisors, whose sum is σ = 25557080. Its totient is φ = 25557078.

The previous prime is 25557073. The next prime is 25557101. The reversal of 25557079 is 97075552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25557079 - 2⁹ = 25556567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25557073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778539 + 12778540.

It is an arithmetic number, because the mean of its divisors is an integer number (12778540).

Almost surely, 2^25557079 is an apocalyptic number.

25557079 is a deficient number, since it is larger than the sum of its proper divisors (1).

25557079 is an equidigital number, since it uses as much as digits as its factorization.

25557079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110250, while the sum is 40.

The square root of 25557079 is about 5055.4009732167. The cubic root of 25557079 is about 294.5577170082.

The spelling of 25557079 in words is "twenty-five million, five hundred fifty-seven thousand, seventy-nine".