25311397 has 2 divisors, whose sum is σ = 25311398. Its totient is φ = 25311396.

The previous prime is 25311389. The next prime is 25311421. The reversal of 25311397 is 79311352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22905796 + 2405601 = 4786^2 + 1551^2 .

It is a cyclic number.

It is not a de Polignac number, because 25311397 - 2³ = 25311389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25311347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12655698 + 12655699.

It is an arithmetic number, because the mean of its divisors is an integer number (12655699).

Almost surely, 2^25311397 is an apocalyptic number.

It is an amenable number.

25311397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25311397 is an equidigital number, since it uses as much as digits as its factorization.

25311397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 31.

The square root of 25311397 is about 5031.0433311591. The cubic root of 25311397 is about 293.6108082366.

The spelling of 25311397 in words is "twenty-five million, three hundred eleven thousand, three hundred ninety-seven".