25969631 has 2 divisors, whose sum is σ = 25969632. Its totient is φ = 25969630.

The previous prime is 25969627. The next prime is 25969663. The reversal of 25969631 is 13696952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25969631 - 2² = 25969627 is a prime.

It is a super-2 number, since 2×25969631² = 1348843468552322, 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 (25969681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12984815 + 12984816.

It is an arithmetic number, because the mean of its divisors is an integer number (12984816).

Almost surely, 2^25969631 is an apocalyptic number.

25969631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25969631 is an equidigital number, since it uses as much as digits as its factorization.

25969631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 41.

The square root of 25969631 is about 5096.0407180477. The cubic root of 25969631 is about 296.1342182580.

The spelling of 25969631 in words is "twenty-five million, nine hundred sixty-nine thousand, six hundred thirty-one".