25355779 has 2 divisors, whose sum is σ = 25355780. Its totient is φ = 25355778.

The previous prime is 25355741. The next prime is 25355797. The reversal of 25355779 is 97755352.

Together with next prime (25355797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25355779 - 2⁷ = 25355651 is a prime.

It is not a weakly prime, because it can be changed into another prime (25355719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12677889 + 12677890.

It is an arithmetic number, because the mean of its divisors is an integer number (12677890).

Almost surely, 2^25355779 is an apocalyptic number.

25355779 is a deficient number, since it is larger than the sum of its proper divisors (1).

25355779 is an equidigital number, since it uses as much as digits as its factorization.

25355779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 330750, while the sum is 43.

The square root of 25355779 is about 5035.4522140519. The cubic root of 25355779 is about 293.7823176153.

The spelling of 25355779 in words is "twenty-five million, three hundred fifty-five thousand, seven hundred seventy-nine".