73363991 has 4 divisors (see below), whose sum is σ = 73649712. Its totient is φ = 73078272.

The previous prime is 73363981. The next prime is 73364003. The reversal of 73363991 is 19936337.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73363991 - 2¹⁴ = 73347607 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 (73363931) 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, 142475 + ... + 142988.

It is an arithmetic number, because the mean of its divisors is an integer number (18412428).

Almost surely, 2^73363991 is an apocalyptic number.

73363991 is a deficient number, since it is larger than the sum of its proper divisors (285721).

73363991 is a wasteful number, since it uses less digits than its factorization.

73363991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285720.

The product of its digits is 91854, while the sum is 41.

The square root of 73363991 is about 8565.2782208169. The cubic root of 73363991 is about 418.6273992910.

The spelling of 73363991 in words is "seventy-three million, three hundred sixty-three thousand, nine hundred ninety-one".