722020717 has 4 divisors (see below), whose sum is σ = 787658976. Its totient is φ = 656382460.

The previous prime is 722020709. The next prime is 722020751. The reversal of 722020717 is 717020227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 722020717 - 2³ = 722020709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722020757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32819113 + ... + 32819134.

It is an arithmetic number, because the mean of its divisors is an integer number (196914744).

Almost surely, 2^722020717 is an apocalyptic number.

It is an amenable number.

722020717 is a deficient number, since it is larger than the sum of its proper divisors (65638259).

722020717 is a wasteful number, since it uses less digits than its factorization.

722020717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65638258.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 722020717 is about 26870.4431857757. The cubic root of 722020717 is about 897.1186522951.

The spelling of 722020717 in words is "seven hundred twenty-two million, twenty thousand, seven hundred seventeen".