389434673 has 4 divisors (see below), whose sum is σ = 389941860. Its totient is φ = 388927488.

The previous prime is 389434651. The next prime is 389434709. The reversal of 389434673 is 376434983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376434983 = 7879 ⋅47777.

It can be written as a sum of positive squares in 2 ways, for example, as 56445169 + 332989504 = 7513^2 + 18248^2 .

It is a cyclic number.

It is not a de Polignac number, because 389434673 - 2¹⁸ = 389172529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389434603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252440 + ... + 253977.

It is an arithmetic number, because the mean of its divisors is an integer number (97485465).

Almost surely, 2^389434673 is an apocalyptic number.

It is an amenable number.

389434673 is a deficient number, since it is larger than the sum of its proper divisors (507187).

389434673 is an equidigital number, since it uses as much as digits as its factorization.

389434673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507186.

The product of its digits is 1306368, while the sum is 47.

The square root of 389434673 is about 19734.0992447084. The cubic root of 389434673 is about 730.2611644518.

The spelling of 389434673 in words is "three hundred eighty-nine million, four hundred thirty-four thousand, six hundred seventy-three".