73990331 has 4 divisors (see below), whose sum is σ = 74082600. Its totient is φ = 73898064.

The previous prime is 73990309. The next prime is 73990349. The reversal of 73990331 is 13309937.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13309937 = 19 ⋅700523.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73990331 is a prime.

It is a super-2 number, since 2×73990331² = 10949138162979122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73990291 and 73990300.

It is not an unprimeable number, because it can be changed into a prime (73990381) 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, 44921 + ... + 46538.

It is an arithmetic number, because the mean of its divisors is an integer number (18520650).

Almost surely, 2^73990331 is an apocalyptic number.

73990331 is a deficient number, since it is larger than the sum of its proper divisors (92269).

73990331 is an equidigital number, since it uses as much as digits as its factorization.

73990331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92268.

The product of its (nonzero) digits is 15309, while the sum is 35.

The square root of 73990331 is about 8601.7632494739. The cubic root of 73990331 is about 419.8153591271.

The spelling of 73990331 in words is "seventy-three million, nine hundred ninety thousand, three hundred thirty-one".