722897597 has 4 divisors (see below), whose sum is σ = 722969916. Its totient is φ = 722825280.

The previous prime is 722897573. The next prime is 722897599. The reversal of 722897597 is 795798227.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 795798227 = 7 ⋅113685461.

It can be written as a sum of positive squares in 2 ways, for example, as 410103001 + 312794596 = 20251^2 + 17686^2 .

It is a cyclic number.

It is not a de Polignac number, because 722897597 - 2⁶ = 722897533 is a prime.

It is a super-3 number, since 3×722897597³ (a number of 28 digits) contains 333 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 (722897599) 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, 18188 + ... + 42149.

It is an arithmetic number, because the mean of its divisors is an integer number (180742479).

Almost surely, 2^722897597 is an apocalyptic number.

It is an amenable number.

722897597 is a deficient number, since it is larger than the sum of its proper divisors (72319).

722897597 is a wasteful number, since it uses less digits than its factorization.

722897597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72318.

The product of its digits is 4445280, while the sum is 56.

The square root of 722897597 is about 26886.7550477926. The cubic root of 722897597 is about 897.4816830396.

The spelling of 722897597 in words is "seven hundred twenty-two million, eight hundred ninety-seven thousand, five hundred ninety-seven".