72733361 has 4 divisors (see below), whose sum is σ = 77011812. Its totient is φ = 68454912.

The previous prime is 72733333. The next prime is 72733369. The reversal of 72733361 is 16333727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59367025 + 13366336 = 7705^2 + 3656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72733361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72733369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2139200 + ... + 2139233.

It is an arithmetic number, because the mean of its divisors is an integer number (19252953).

Almost surely, 2^72733361 is an apocalyptic number.

It is an amenable number.

72733361 is a deficient number, since it is larger than the sum of its proper divisors (4278451).

72733361 is a wasteful number, since it uses less digits than its factorization.

72733361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278450.

The product of its digits is 15876, while the sum is 32.

The square root of 72733361 is about 8528.3856033836. The cubic root of 72733361 is about 417.4244518900.

The spelling of 72733361 in words is "seventy-two million, seven hundred thirty-three thousand, three hundred sixty-one".