999725759 has 2 divisors, whose sum is σ = 999725760. Its totient is φ = 999725758.

The previous prime is 999725743. The next prime is 999725761. The reversal of 999725759 is 957527999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999725759 - 2⁴ = 999725743 is a prime.

Together with 999725761, 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 (999725959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499862879 + 499862880.

It is an arithmetic number, because the mean of its divisors is an integer number (499862880).

Almost surely, 2^999725759 is an apocalyptic number.

999725759 is a deficient number, since it is larger than the sum of its proper divisors (1).

999725759 is an equidigital number, since it uses as much as digits as its factorization.

999725759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16074450, while the sum is 62.

The square root of 999725759 is about 31618.4401734178. The cubic root of 999725759 is about 999.9085779756.

The spelling of 999725759 in words is "nine hundred ninety-nine million, seven hundred twenty-five thousand, seven hundred fifty-nine".