25538969 has 2 divisors, whose sum is σ = 25538970. Its totient is φ = 25538968.

The previous prime is 25538963. The next prime is 25539013. The reversal of 25538969 is 96983552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16297369 + 9241600 = 4037^2 + 3040^2 .

It is a cyclic number.

It is not a de Polignac number, because 25538969 - 2⁸ = 25538713 is a prime.

It is a super-2 number, since 2×25538969² = 1304477875165922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25538963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12769484 + 12769485.

It is an arithmetic number, because the mean of its divisors is an integer number (12769485).

Almost surely, 2^25538969 is an apocalyptic number.

It is an amenable number.

25538969 is a deficient number, since it is larger than the sum of its proper divisors (1).

25538969 is an equidigital number, since it uses as much as digits as its factorization.

25538969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 47.

The square root of 25538969 is about 5053.6095021282. The cubic root of 25538969 is about 294.4881250598.

The spelling of 25538969 in words is "twenty-five million, five hundred thirty-eight thousand, nine hundred sixty-nine".