73621329 has 8 divisors (see below), whose sum is σ = 98378400. Its totient is φ = 48972576.

The previous prime is 73621309. The next prime is 73621369. The reversal of 73621329 is 92312637.

It is a happy number.

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

It is not a de Polignac number, because 73621329 - 2¹² = 73617233 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73621329.

It is not an unprimeable number, because it can be changed into a prime (73621309) 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, 25479 + ... + 28220.

It is an arithmetic number, because the mean of its divisors is an integer number (12297300).

Almost surely, 2^73621329 is an apocalyptic number.

It is an amenable number.

73621329 is a deficient number, since it is larger than the sum of its proper divisors (24757071).

73621329 is a wasteful number, since it uses less digits than its factorization.

73621329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54159.

The product of its digits is 13608, while the sum is 33.

The square root of 73621329 is about 8580.2872329544. The cubic root of 73621329 is about 419.1162995517.

The spelling of 73621329 in words is "seventy-three million, six hundred twenty-one thousand, three hundred twenty-nine".