25809713 has 2 divisors, whose sum is σ = 25809714. Its totient is φ = 25809712.

The previous prime is 25809691. The next prime is 25809767. The reversal of 25809713 is 31790852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15460624 + 10349089 = 3932^2 + 3217^2 .

It is a cyclic number.

It is not a de Polignac number, because 25809713 - 2⁸ = 25809457 is a prime.

It is a super-2 number, since 2×25809713² = 1332282570284738, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25889713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12904856 + 12904857.

It is an arithmetic number, because the mean of its divisors is an integer number (12904857).

Almost surely, 2^25809713 is an apocalyptic number.

It is an amenable number.

25809713 is a deficient number, since it is larger than the sum of its proper divisors (1).

25809713 is an equidigital number, since it uses as much as digits as its factorization.

25809713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 25809713 is about 5080.3260722123. The cubic root of 25809713 is about 295.5251127923.

The spelling of 25809713 in words is "twenty-five million, eight hundred nine thousand, seven hundred thirteen".