25681319 has 2 divisors, whose sum is σ = 25681320. Its totient is φ = 25681318.

The previous prime is 25681291. The next prime is 25681321. The reversal of 25681319 is 91318652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25681319 - 2⁸ = 25681063 is a prime.

It is a super-2 number, since 2×25681319² = 1319060291159522, which contains 22 as substring.

Together with 25681321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25683319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12840659 + 12840660.

It is an arithmetic number, because the mean of its divisors is an integer number (12840660).

Almost surely, 2^25681319 is an apocalyptic number.

25681319 is a deficient number, since it is larger than the sum of its proper divisors (1).

25681319 is an equidigital number, since it uses as much as digits as its factorization.

25681319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 25681319 is about 5067.6739240010. The cubic root of 25681319 is about 295.0342543772.

The spelling of 25681319 in words is "twenty-five million, six hundred eighty-one thousand, three hundred nineteen".