389666983 has 4 divisors (see below), whose sum is σ = 390243240. Its totient is φ = 389090728.

The previous prime is 389666969. The next prime is 389666987.

389666983 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389666983 - 2⁵ = 389666951 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389666987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287113 + ... + 288466.

It is an arithmetic number, because the mean of its divisors is an integer number (97560810).

Almost surely, 2^389666983 is an apocalyptic number.

389666983 is a deficient number, since it is larger than the sum of its proper divisors (576257).

389666983 is an equidigital number, since it uses as much as digits as its factorization.

389666983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576256.

The product of its digits is 10077696, while the sum is 58.

The square root of 389666983 is about 19739.9843718277. The cubic root of 389666983 is about 730.4063434860.

The spelling of 389666983 in words is "three hundred eighty-nine million, six hundred sixty-six thousand, nine hundred eighty-three".