25279757 has 2 divisors, whose sum is σ = 25279758. Its totient is φ = 25279756.

The previous prime is 25279741. The next prime is 25279759. The reversal of 25279757 is 75797252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14853316 + 10426441 = 3854^2 + 3229^2 .

It is a cyclic number.

It is not a de Polignac number, because 25279757 - 2⁴ = 25279741 is a prime.

It is a super-2 number, since 2×25279757² = 1278132227958098, which contains 22 as substring.

Together with 25279759, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25279759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12639878 + 12639879.

It is an arithmetic number, because the mean of its divisors is an integer number (12639879).

Almost surely, 2^25279757 is an apocalyptic number.

It is an amenable number.

25279757 is a deficient number, since it is larger than the sum of its proper divisors (1).

25279757 is an equidigital number, since it uses as much as digits as its factorization.

25279757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 308700, while the sum is 44.

The square root of 25279757 is about 5027.8978708800. The cubic root of 25279757 is about 293.4884164734.

The spelling of 25279757 in words is "twenty-five million, two hundred seventy-nine thousand, seven hundred fifty-seven".