25513727 has 2 divisors, whose sum is σ = 25513728. Its totient is φ = 25513726.

The previous prime is 25513703. The next prime is 25513729. The reversal of 25513727 is 72731552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25513727 is a prime.

It is a super-5 number, since 5×25513727⁵ (a number of 38 digits) contains 55555 as substring.

Together with 25513729, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25513693 and 25513702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25513729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12756863 + 12756864.

It is an arithmetic number, because the mean of its divisors is an integer number (12756864).

Almost surely, 2^25513727 is an apocalyptic number.

25513727 is a deficient number, since it is larger than the sum of its proper divisors (1).

25513727 is an equidigital number, since it uses as much as digits as its factorization.

25513727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 32.

The square root of 25513727 is about 5051.1114618468. Note that the first 3 decimals coincide. The cubic root of 25513727 is about 294.3910718127.

The spelling of 25513727 in words is "twenty-five million, five hundred thirteen thousand, seven hundred twenty-seven".