73329721 has 8 divisors (see below), whose sum is σ = 81730080. Its totient is φ = 65383488.

The previous prime is 73329701. The next prime is 73329733. The reversal of 73329721 is 12792337.

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 73329721 - 2⁷ = 73329593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73329701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113191 + ... + 113836.

It is an arithmetic number, because the mean of its divisors is an integer number (10216260).

Almost surely, 2^73329721 is an apocalyptic number.

It is an amenable number.

73329721 is a deficient number, since it is larger than the sum of its proper divisors (8400359).

73329721 is a wasteful number, since it uses less digits than its factorization.

73329721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227063.

The product of its digits is 15876, while the sum is 34.

The square root of 73329721 is about 8563.2774683529. The cubic root of 73329721 is about 418.5622056577.

The spelling of 73329721 in words is "seventy-three million, three hundred twenty-nine thousand, seven hundred twenty-one".