25747279 has 2 divisors, whose sum is σ = 25747280. Its totient is φ = 25747278.

The previous prime is 25747277. The next prime is 25747283. The reversal of 25747279 is 97274752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25747279 - 2¹ = 25747277 is a prime.

Together with 25747277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25747277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12873639 + 12873640.

It is an arithmetic number, because the mean of its divisors is an integer number (12873640).

Almost surely, 2^25747279 is an apocalyptic number.

25747279 is a deficient number, since it is larger than the sum of its proper divisors (1).

25747279 is an equidigital number, since it uses as much as digits as its factorization.

25747279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 43.

The square root of 25747279 is about 5074.1776673664. The cubic root of 25747279 is about 295.2866274787.

The spelling of 25747279 in words is "twenty-five million, seven hundred forty-seven thousand, two hundred seventy-nine".