25979449 has 2 divisors, whose sum is σ = 25979450. Its totient is φ = 25979448.

The previous prime is 25979423. The next prime is 25979453. The reversal of 25979449 is 94497952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25431849 + 547600 = 5043^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 25979449 - 2¹¹ = 25977401 is a prime.

It is not a weakly prime, because it can be changed into another prime (25979549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12989724 + 12989725.

It is an arithmetic number, because the mean of its divisors is an integer number (12989725).

Almost surely, 2^25979449 is an apocalyptic number.

It is an amenable number.

25979449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25979449 is an equidigital number, since it uses as much as digits as its factorization.

25979449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 25979449 is about 5097.0039238753. The cubic root of 25979449 is about 296.1715320912.

The spelling of 25979449 in words is "twenty-five million, nine hundred seventy-nine thousand, four hundred forty-nine".