25947479 has 2 divisors, whose sum is σ = 25947480. Its totient is φ = 25947478.

The previous prime is 25947419. The next prime is 25947487. The reversal of 25947479 is 97474952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25947479 - 2⁸ = 25947223 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25947409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12973739 + 12973740.

It is an arithmetic number, because the mean of its divisors is an integer number (12973740).

Almost surely, 2^25947479 is an apocalyptic number.

25947479 is a deficient number, since it is larger than the sum of its proper divisors (1).

25947479 is an equidigital number, since it uses as much as digits as its factorization.

25947479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 47.

The square root of 25947479 is about 5093.8668023418. The cubic root of 25947479 is about 296.0499938383.

The spelling of 25947479 in words is "twenty-five million, nine hundred forty-seven thousand, four hundred seventy-nine".