25297619 has 2 divisors, whose sum is σ = 25297620. Its totient is φ = 25297618.

The previous prime is 25297507. The next prime is 25297621. The reversal of 25297619 is 91679252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25297619 is a prime.

It is a super-2 number, since 2×25297619² = 1279939054138322, which contains 22 as substring.

Together with 25297621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25297669) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12648809 + 12648810.

It is an arithmetic number, because the mean of its divisors is an integer number (12648810).

Almost surely, 2^25297619 is an apocalyptic number.

25297619 is a deficient number, since it is larger than the sum of its proper divisors (1).

25297619 is an equidigital number, since it uses as much as digits as its factorization.

25297619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 25297619 is about 5029.6738462847. The cubic root of 25297619 is about 293.5575238873.

The spelling of 25297619 in words is "twenty-five million, two hundred ninety-seven thousand, six hundred nineteen".