73211993 has 4 divisors (see below), whose sum is σ = 73256208. Its totient is φ = 73167780.

The previous prime is 73211977. The next prime is 73212077. The reversal of 73211993 is 39911237.

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 73211993 - 2⁴ = 73211977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73211903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19523 + ... + 22968.

It is an arithmetic number, because the mean of its divisors is an integer number (18314052).

Almost surely, 2^73211993 is an apocalyptic number.

It is an amenable number.

73211993 is a deficient number, since it is larger than the sum of its proper divisors (44215).

73211993 is a wasteful number, since it uses less digits than its factorization.

73211993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44214.

The product of its digits is 10206, while the sum is 35.

The square root of 73211993 is about 8556.4007035669. The cubic root of 73211993 is about 418.3380905935.

The spelling of 73211993 in words is "seventy-three million, two hundred eleven thousand, nine hundred ninety-three".