866813983 has 8 divisors (see below), whose sum is σ = 992427552. Its totient is φ = 741646176.

The previous prime is 866813977. The next prime is 866813999. The reversal of 866813983 is 389318668.

866813983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 866813983 - 2⁹ = 866813471 is a prime.

It is a super-2 number, since 2×866813983² = 1502732962248648578, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866813983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866813183) 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, 107260 + ... + 115057.

It is an arithmetic number, because the mean of its divisors is an integer number (124053444).

Almost surely, 2^866813983 is an apocalyptic number.

866813983 is a deficient number, since it is larger than the sum of its proper divisors (125613569).

866813983 is a wasteful number, since it uses less digits than its factorization.

866813983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222881.

The product of its digits is 1492992, while the sum is 52.

The square root of 866813983 is about 29441.7048249588. The cubic root of 866813983 is about 953.4735198051.

The spelling of 866813983 in words is "eight hundred sixty-six million, eight hundred thirteen thousand, nine hundred eighty-three".