723162721073 has 8 divisors (see below), whose sum is σ = 778816738728. Its totient is φ = 667512434304.

The previous prime is 723162721067. The next prime is 723162721123. The reversal of 723162721073 is 370127261327.

It can be written as a sum of positive squares in 4 ways, for example, as 15693324529 + 707469396544 = 125273^2 + 841112^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 723162721073 - 2⁸ = 723162720817 is a prime.

It is a super-2 number, since 2×723162721073² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 723162721073.

It is not an unprimeable number, because it can be changed into a prime (723162721003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523490 + ... + 1311627.

It is an arithmetic number, because the mean of its divisors is an integer number (97352092341).

Almost surely, 2^723162721073 is an apocalyptic number.

It is an amenable number.

723162721073 is a deficient number, since it is larger than the sum of its proper divisors (55654017655).

723162721073 is a wasteful number, since it uses less digits than its factorization.

723162721073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865443.

The product of its (nonzero) digits is 148176, while the sum is 41.

The spelling of 723162721073 in words is "seven hundred twenty-three billion, one hundred sixty-two million, seven hundred twenty-one thousand, seventy-three".