723539073321 has 27 divisors (see below), whose sum is σ = 1103086854909. Its totient is φ = 456941424312.

The previous prime is 723539073319. The next prime is 723539073329. The reversal of 723539073321 is 123370935327.

The square root of 723539073321 is 850611.

It is a perfect power (a square), and thus also a powerful number.

723539073321 is a `hidden beast` number, since 7 + 23 + 539 + 0 + 73 + 3 + 21 = 666.

It is not a de Polignac number, because 723539073321 - 2¹ = 723539073319 is a prime.

It is a super-2 number, since 2×723539073321² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (723539073329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 48477366 + ... + 48492288.

Almost surely, 2^723539073321 is an apocalyptic number.

723539073321 is the 850611-st square number.

723539073321 is the 425306-th centered octagonal number.

It is an amenable number.

723539073321 is a deficient number, since it is larger than the sum of its proper divisors (379547781588).

723539073321 is an frugal number, since it uses more digits than its factorization.

723539073321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29890 (or 14945 counting only the distinct ones).

The product of its (nonzero) digits is 714420, while the sum is 45.

The spelling of 723539073321 in words is "seven hundred twenty-three billion, five hundred thirty-nine million, seventy-three thousand, three hundred twenty-one".