25279591 has 2 divisors, whose sum is σ = 25279592. Its totient is φ = 25279590.

The previous prime is 25279549. The next prime is 25279609. The reversal of 25279591 is 19597252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25279591 - 2¹⁹ = 24755303 is a prime.

It is a super-2 number, since 2×25279591² = 1278115442254562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25279531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12639795 + 12639796.

It is an arithmetic number, because the mean of its divisors is an integer number (12639796).

Almost surely, 2^25279591 is an apocalyptic number.

25279591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25279591 is an equidigital number, since it uses as much as digits as its factorization.

25279591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 25279591 is about 5027.8813629599. The cubic root of 25279591 is about 293.4877740729.

The spelling of 25279591 in words is "twenty-five million, two hundred seventy-nine thousand, five hundred ninety-one".