723919720322 has 6 divisors (see below), whose sum is σ = 1085881385379. Its totient is φ = 361959258530.

The previous prime is 723919720313. The next prime is 723919720331. The reversal of 723919720322 is 223027919327.

It is an interprime number because it is at equal distance from previous prime (723919720313) and next prime (723919720331).

It can be written as a sum of positive squares in only one way, i.e., 361959860161 + 361959860161 = 601631^2 + 601631^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=601631.

It is a super-2 number, since 2×723919720322² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 902447 + ... + 1504077.

Almost surely, 2^723919720322 is an apocalyptic number.

723919720322 is a deficient number, since it is larger than the sum of its proper divisors (361961665057).

723919720322 is an frugal number, since it uses more digits than its factorization.

723919720322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203264 (or 601633 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 47.

The spelling of 723919720322 in words is "seven hundred twenty-three billion, nine hundred nineteen million, seven hundred twenty thousand, three hundred twenty-two".