722684723 has 4 divisors (see below), whose sum is σ = 722836560. Its totient is φ = 722532888.

The previous prime is 722684707. The next prime is 722684731. The reversal of 722684723 is 327486227.

722684723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327486227 = 821 ⋅398887.

It is a cyclic number.

It is not a de Polignac number, because 722684723 - 2⁴ = 722684707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722674723) 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, 68540 + ... + 78377.

It is an arithmetic number, because the mean of its divisors is an integer number (180709140).

Almost surely, 2^722684723 is an apocalyptic number.

722684723 is a deficient number, since it is larger than the sum of its proper divisors (151837).

722684723 is a wasteful number, since it uses less digits than its factorization.

722684723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151836.

The product of its digits is 225792, while the sum is 41.

The square root of 722684723 is about 26882.7960413347. The cubic root of 722684723 is about 897.3935796103.

The spelling of 722684723 in words is "seven hundred twenty-two million, six hundred eighty-four thousand, seven hundred twenty-three".