73799991 has 10 divisors (see below), whose sum is σ = 110244552. Its totient is φ = 49199940.

The previous prime is 73799981. The next prime is 73800053. The reversal of 73799991 is 19999737.

It is not a de Polignac number, because 73799991 - 2⁶ = 73799927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73799981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 455475 + ... + 455636.

Almost surely, 2^73799991 is an apocalyptic number.

73799991 is a deficient number, since it is larger than the sum of its proper divisors (36444561).

73799991 is an equidigital number, since it uses as much as digits as its factorization.

73799991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911123 (or 911114 counting only the distinct ones).

The product of its digits is 964467, while the sum is 54.

The square root of 73799991 is about 8590.6921141431. The cubic root of 73799991 is about 419.4550585615.

The spelling of 73799991 in words is "seventy-three million, seven hundred ninety-nine thousand, nine hundred ninety-one".