724280996209 has 9 divisors (see below), whose sum is σ = 726869715723. Its totient is φ = 721701472752.

The previous prime is 724280996203. The next prime is 724280996213. The reversal of 724280996209 is 902699082427.

The square root of 724280996209 is 851047.

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

It can be written as a sum of positive squares in only one way, i.e., 4620600625 + 719660395584 = 67975^2 + 848328^2 .

It is not a de Polignac number, because 724280996209 - 2²³ = 724272607601 is a prime.

It is a super-2 number, since 2×724280996209² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724280996203) 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 8 ways as a sum of consecutive naturals, for example, 266376352 + ... + 266379070.

It is an arithmetic number, because the mean of its divisors is an integer number (80763301747).

Almost surely, 2^724280996209 is an apocalyptic number.

724280996209 is the 851047-th square number.

724280996209 is the 425524-th centered octagonal number.

It is an amenable number.

724280996209 is a deficient number, since it is larger than the sum of its proper divisors (2588719514).

724280996209 is an frugal number, since it uses more digits than its factorization.

724280996209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6064 (or 3032 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 724280996209 in words is "seven hundred twenty-four billion, two hundred eighty million, nine hundred ninety-six thousand, two hundred nine".