25613759 has 2 divisors, whose sum is σ = 25613760. Its totient is φ = 25613758.

The previous prime is 25613711. The next prime is 25613761. The reversal of 25613759 is 95731652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25613759 - 2⁸ = 25613503 is a prime.

It is a super-2 number, since 2×25613759² = 1312129300220162, which contains 22 as substring.

Together with 25613761, 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 (25613779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12806879 + 12806880.

It is an arithmetic number, because the mean of its divisors is an integer number (12806880).

Almost surely, 2^25613759 is an apocalyptic number.

25613759 is a deficient number, since it is larger than the sum of its proper divisors (1).

25613759 is an equidigital number, since it uses as much as digits as its factorization.

25613759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 38.

The square root of 25613759 is about 5061.0037541974. The cubic root of 25613759 is about 294.7753110486.

Subtracting from 25613759 its sum of digits (38), we obtain a square (25613721 = 5061²).

The spelling of 25613759 in words is "twenty-five million, six hundred thirteen thousand, seven hundred fifty-nine".