722534389 has 4 divisors (see below), whose sum is σ = 722707756. Its totient is φ = 722361024.

The previous prime is 722534387. The next prime is 722534401. The reversal of 722534389 is 983435227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 70140625 + 652393764 = 8375^2 + 25542^2 .

It is a cyclic number.

It is not a de Polignac number, because 722534389 - 2¹ = 722534387 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 (722534383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80274 + ... + 88819.

It is an arithmetic number, because the mean of its divisors is an integer number (180676939).

Almost surely, 2^722534389 is an apocalyptic number.

It is an amenable number.

722534389 is a deficient number, since it is larger than the sum of its proper divisors (173367).

722534389 is a wasteful number, since it uses less digits than its factorization.

722534389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173366.

The product of its digits is 362880, while the sum is 43.

The square root of 722534389 is about 26879.9997953869. Note that the first 3 decimals coincide. The cubic root of 722534389 is about 897.3313495590.

It can be divided in two parts, 7225 and 34389, that added together give a palindrome (41614).

The spelling of 722534389 in words is "seven hundred twenty-two million, five hundred thirty-four thousand, three hundred eighty-nine".