8931993 has 8 divisors (see below), whose sum is σ = 13610688. Its totient is φ = 5103984.

The previous prime is 8931983. The next prime is 8931997. The reversal of 8931993 is 3991398.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8931993 - 2⁵ = 8931961 is a prime.

8931993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8931997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212646 + ... + 212687.

It is an arithmetic number, because the mean of its divisors is an integer number (1701336).

Almost surely, 2^8931993 is an apocalyptic number.

It is an amenable number.

8931993 is a deficient number, since it is larger than the sum of its proper divisors (4678695).

8931993 is a wasteful number, since it uses less digits than its factorization.

8931993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425343.

The product of its digits is 52488, while the sum is 42.

The square root of 8931993 is about 2988.6440069035. The cubic root of 8931993 is about 207.4831301909.

The spelling of 8931993 in words is "eight million, nine hundred thirty-one thousand, nine hundred ninety-three".