73979321 has 4 divisors (see below), whose sum is σ = 79670052. Its totient is φ = 68288592.

The previous prime is 73979309. The next prime is 73979327. The reversal of 73979321 is 12397937.

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 11806096 + 62173225 = 3436^2 + 7885^2 .

It is a cyclic number.

It is not a de Polignac number, because 73979321 - 2¹⁸ = 73717177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73979327) 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, 2845346 + ... + 2845371.

It is an arithmetic number, because the mean of its divisors is an integer number (19917513).

Almost surely, 2^73979321 is an apocalyptic number.

It is an amenable number.

73979321 is a deficient number, since it is larger than the sum of its proper divisors (5690731).

73979321 is a wasteful number, since it uses less digits than its factorization.

73979321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690730.

The product of its digits is 71442, while the sum is 41.

The square root of 73979321 is about 8601.1232406006. The cubic root of 73979321 is about 419.7945348008.

The spelling of 73979321 in words is "seventy-three million, nine hundred seventy-nine thousand, three hundred twenty-one".