73216973 has 4 divisors (see below), whose sum is σ = 73421280. Its totient is φ = 73012668.

The previous prime is 73216849. The next prime is 73216991. The reversal of 73216973 is 37961237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73216973 - 2¹² = 73212877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73296973) 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, 101615 + ... + 102332.

It is an arithmetic number, because the mean of its divisors is an integer number (18355320).

Almost surely, 2^73216973 is an apocalyptic number.

It is an amenable number.

73216973 is a deficient number, since it is larger than the sum of its proper divisors (204307).

73216973 is a wasteful number, since it uses less digits than its factorization.

73216973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204306.

The product of its digits is 47628, while the sum is 38.

The square root of 73216973 is about 8556.6917088323. The cubic root of 73216973 is about 418.3475757264.

The spelling of 73216973 in words is "seventy-three million, two hundred sixteen thousand, nine hundred seventy-three".