722530643 has 4 divisors (see below), whose sum is σ = 722683320. Its totient is φ = 722377968.

The previous prime is 722530619. The next prime is 722530657. The reversal of 722530643 is 346035227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346035227 = 12893 ⋅26839.

It is a cyclic number.

It is not a de Polignac number, because 722530643 - 2²⁰ = 721482067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722530663) 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, 69005 + ... + 78782.

It is an arithmetic number, because the mean of its divisors is an integer number (180670830).

Almost surely, 2^722530643 is an apocalyptic number.

722530643 is a deficient number, since it is larger than the sum of its proper divisors (152677).

722530643 is a wasteful number, since it uses less digits than its factorization.

722530643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152676.

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 722530643 is about 26879.9301152365. The cubic root of 722530643 is about 897.3297988097.

The spelling of 722530643 in words is "seven hundred twenty-two million, five hundred thirty thousand, six hundred forty-three".