73873321 has 4 divisors (see below), whose sum is σ = 74109652. Its totient is φ = 73636992.

The previous prime is 73873301. The next prime is 73873343. The reversal of 73873321 is 12337837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12337837 = 1613 ⋅7649.

It can be written as a sum of positive squares in 2 ways, for example, as 1010025 + 72863296 = 1005^2 + 8536^2 .

It is a cyclic number.

It is not a de Polignac number, because 73873321 - 2⁷ = 73873193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73873301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117696 + ... + 118321.

It is an arithmetic number, because the mean of its divisors is an integer number (18527413).

Almost surely, 2^73873321 is an apocalyptic number.

It is an amenable number.

73873321 is a deficient number, since it is larger than the sum of its proper divisors (236331).

73873321 is a wasteful number, since it uses less digits than its factorization.

73873321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236330.

The product of its digits is 21168, while the sum is 34.

The square root of 73873321 is about 8594.9590458594. The cubic root of 73873321 is about 419.5939405002.

The spelling of 73873321 in words is "seventy-three million, eight hundred seventy-three thousand, three hundred twenty-one".