722745785 has 4 divisors (see below), whose sum is σ = 867294948. Its totient is φ = 578196624.

The previous prime is 722745761. The next prime is 722745791. The reversal of 722745785 is 587547227.

722745785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 277155904 + 445589881 = 16648^2 + 21109^2 .

It is a cyclic number.

It is not a de Polignac number, because 722745785 - 2¹⁴ = 722729401 is a prime.

It is a super-2 number, since 2×722745785² = 1044722939470532450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72274574 + ... + 72274583.

It is an arithmetic number, because the mean of its divisors is an integer number (216823737).

Almost surely, 2^722745785 is an apocalyptic number.

It is an amenable number.

722745785 is a deficient number, since it is larger than the sum of its proper divisors (144549163).

722745785 is a wasteful number, since it uses less digits than its factorization.

722745785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144549162.

The product of its digits is 1097600, while the sum is 47.

The square root of 722745785 is about 26883.9317251030. The cubic root of 722745785 is about 897.4188534730.

The spelling of 722745785 in words is "seven hundred twenty-two million, seven hundred forty-five thousand, seven hundred eighty-five".