722943643 has 4 divisors (see below), whose sum is σ = 723669760. Its totient is φ = 722217528.

The previous prime is 722943607. The next prime is 722943667. The reversal of 722943643 is 346349227.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722943643 is a prime.

It is a super-2 number, since 2×722943643² = 1045295021908222898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722943596 and 722943605.

It is not an unprimeable number, because it can be changed into a prime (722946643) 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, 361563 + ... + 363556.

It is an arithmetic number, because the mean of its divisors is an integer number (180917440).

Almost surely, 2^722943643 is an apocalyptic number.

722943643 is a deficient number, since it is larger than the sum of its proper divisors (726117).

722943643 is an equidigital number, since it uses as much as digits as its factorization.

722943643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726116.

The product of its digits is 217728, while the sum is 40.

The square root of 722943643 is about 26887.6113293836. The cubic root of 722943643 is about 897.5007380963.

The spelling of 722943643 in words is "seven hundred twenty-two million, nine hundred forty-three thousand, six hundred forty-three".