25720727 has 2 divisors, whose sum is σ = 25720728. Its totient is φ = 25720726.

The previous prime is 25720691. The next prime is 25720729. The reversal of 25720727 is 72702752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25720727 - 2⁶ = 25720663 is a prime.

Together with 25720729, 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 = 25720693 and 25720702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25720729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12860363 + 12860364.

It is an arithmetic number, because the mean of its divisors is an integer number (12860364).

Almost surely, 2^25720727 is an apocalyptic number.

25720727 is a deficient number, since it is larger than the sum of its proper divisors (1).

25720727 is an equidigital number, since it uses as much as digits as its factorization.

25720727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 25720727 is about 5071.5606079391. The cubic root of 25720727 is about 295.1850873348.

The spelling of 25720727 in words is "twenty-five million, seven hundred twenty thousand, seven hundred twenty-seven".