725759999 has 4 divisors (see below), whose sum is σ = 726159936. Its totient is φ = 725360064.

The previous prime is 725759987. The next prime is 725760001. The reversal of 725759999 is 999957527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 725759999 - 2⁸ = 725759743 is a prime.

It is a super-2 number, since 2×725759999² = 1053455152296960002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725759959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197234 + ... + 200879.

It is an arithmetic number, because the mean of its divisors is an integer number (181539984).

Almost surely, 2^725759999 is an apocalyptic number.

725759999 is a deficient number, since it is larger than the sum of its proper divisors (399937).

725759999 is a wasteful number, since it uses less digits than its factorization.

725759999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399936.

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

The square root of 725759999 is about 26939.9331662126. The cubic root of 725759999 is about 898.6646860535.

The spelling of 725759999 in words is "seven hundred twenty-five million, seven hundred fifty-nine thousand, nine hundred ninety-nine".