25765739 has 2 divisors, whose sum is σ = 25765740. Its totient is φ = 25765738.

The previous prime is 25765723. The next prime is 25765757. The reversal of 25765739 is 93756752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25765739 - 2⁴ = 25765723 is a prime.

It is a super-2 number, since 2×25765739² = 1327746612432242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25765739.

It is not a weakly prime, because it can be changed into another prime (25765799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12882869 + 12882870.

It is an arithmetic number, because the mean of its divisors is an integer number (12882870).

Almost surely, 2^25765739 is an apocalyptic number.

25765739 is a deficient number, since it is larger than the sum of its proper divisors (1).

25765739 is an equidigital number, since it uses as much as digits as its factorization.

25765739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 396900, while the sum is 44.

The square root of 25765739 is about 5075.9963553966. The cubic root of 25765739 is about 295.3571810691.

The spelling of 25765739 in words is "twenty-five million, seven hundred sixty-five thousand, seven hundred thirty-nine".