8011993 has 8 divisors (see below), whose sum is σ = 8769600. Its totient is φ = 7259280.

The previous prime is 8011979. The next prime is 8011999. The reversal of 8011993 is 3991108.

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

It is a cyclic number.

It is not a de Polignac number, because 8011993 - 2⁵ = 8011961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8011999) 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 7 ways as a sum of consecutive naturals, for example, 2796 + ... + 4882.

It is an arithmetic number, because the mean of its divisors is an integer number (1096200).

Almost surely, 2^8011993 is an apocalyptic number.

It is an amenable number.

8011993 is a deficient number, since it is larger than the sum of its proper divisors (757607).

8011993 is a wasteful number, since it uses less digits than its factorization.

8011993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 8011993 is about 2830.5464136806. The cubic root of 8011993 is about 200.0998917665.

The spelling of 8011993 in words is "eight million, eleven thousand, nine hundred ninety-three".