722172659 has 12 divisors (see below), whose sum is σ = 800191656. Its totient is φ = 651111552.

The previous prime is 722172643. The next prime is 722172707. The reversal of 722172659 is 956271227.

It is not a de Polignac number, because 722172659 - 2⁴ = 722172643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722172959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42422 + ... + 56955.

It is an arithmetic number, because the mean of its divisors is an integer number (66682638).

Almost surely, 2^722172659 is an apocalyptic number.

722172659 is a deficient number, since it is larger than the sum of its proper divisors (78018997).

722172659 is a wasteful number, since it uses less digits than its factorization.

722172659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99446 (or 99433 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 722172659 is about 26873.2703443403. The cubic root of 722172659 is about 897.1815777479.

The spelling of 722172659 in words is "seven hundred twenty-two million, one hundred seventy-two thousand, six hundred fifty-nine".