25638269 has 2 divisors, whose sum is σ = 25638270. Its totient is φ = 25638268.

The previous prime is 25638259. The next prime is 25638293. The reversal of 25638269 is 96283652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24108100 + 1530169 = 4910^2 + 1237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25638269 is a prime.

It is a super-2 number, since 2×25638269² = 1314641674632722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25638259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12819134 + 12819135.

It is an arithmetic number, because the mean of its divisors is an integer number (12819135).

Almost surely, 2^25638269 is an apocalyptic number.

It is an amenable number.

25638269 is a deficient number, since it is larger than the sum of its proper divisors (1).

25638269 is an equidigital number, since it uses as much as digits as its factorization.

25638269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 25638269 is about 5063.4246316105. The cubic root of 25638269 is about 294.8693053163.

The spelling of 25638269 in words is "twenty-five million, six hundred thirty-eight thousand, two hundred sixty-nine".