389531843 has 4 divisors (see below), whose sum is σ = 391509360. Its totient is φ = 387554328.

The previous prime is 389531839. The next prime is 389531861. The reversal of 389531843 is 348135983.

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 389531843 - 2² = 389531839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389531794 and 389531803.

It is not an unprimeable number, because it can be changed into a prime (389531803) 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, 988463 + ... + 988856.

It is an arithmetic number, because the mean of its divisors is an integer number (97877340).

Almost surely, 2^389531843 is an apocalyptic number.

389531843 is a deficient number, since it is larger than the sum of its proper divisors (1977517).

389531843 is a wasteful number, since it uses less digits than its factorization.

389531843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977516.

The product of its digits is 311040, while the sum is 44.

The square root of 389531843 is about 19736.5610732974. The cubic root of 389531843 is about 730.3218965688.

The spelling of 389531843 in words is "three hundred eighty-nine million, five hundred thirty-one thousand, eight hundred forty-three".