25662479 has 2 divisors, whose sum is σ = 25662480. Its totient is φ = 25662478.

The previous prime is 25662467. The next prime is 25662551. The reversal of 25662479 is 97426652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25662479 - 2²⁰ = 24613903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25662409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12831239 + 12831240.

It is an arithmetic number, because the mean of its divisors is an integer number (12831240).

Almost surely, 2^25662479 is an apocalyptic number.

25662479 is a deficient number, since it is larger than the sum of its proper divisors (1).

25662479 is an equidigital number, since it uses as much as digits as its factorization.

25662479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 25662479 is about 5065.8147419739. The cubic root of 25662479 is about 294.9620903119.

The spelling of 25662479 in words is "twenty-five million, six hundred sixty-two thousand, four hundred seventy-nine".