25979269 has 2 divisors, whose sum is σ = 25979270. Its totient is φ = 25979268.

The previous prime is 25979243. The next prime is 25979311. The reversal of 25979269 is 96297952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 12510369 = 3670^2 + 3537^2 .

It is a cyclic number.

It is not a de Polignac number, because 25979269 - 2⁷ = 25979141 is a prime.

It is a super-2 number, since 2×25979269² = 1349844835548722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25479269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12989634 + 12989635.

It is an arithmetic number, because the mean of its divisors is an integer number (12989635).

Almost surely, 2^25979269 is an apocalyptic number.

It is an amenable number.

25979269 is a deficient number, since it is larger than the sum of its proper divisors (1).

25979269 is an equidigital number, since it uses as much as digits as its factorization.

25979269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 49.

The square root of 25979269 is about 5096.9862664127. The cubic root of 25979269 is about 296.1708480762.

The spelling of 25979269 in words is "twenty-five million, nine hundred seventy-nine thousand, two hundred sixty-nine".