389739643 has 8 divisors (see below), whose sum is σ = 391637808. Its totient is φ = 387846624.

The previous prime is 389739641. The next prime is 389739653. The reversal of 389739643 is 346937983.

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 389739643 - 2¹ = 389739641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389739641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267505 + ... + 268957.

It is an arithmetic number, because the mean of its divisors is an integer number (48954726).

Almost surely, 2^389739643 is an apocalyptic number.

389739643 is a deficient number, since it is larger than the sum of its proper divisors (1898165).

389739643 is a wasteful number, since it uses less digits than its factorization.

389739643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573.

The product of its digits is 2939328, while the sum is 52.

The square root of 389739643 is about 19741.8247130299. The cubic root of 389739643 is about 730.4517395368.

The spelling of 389739643 in words is "three hundred eighty-nine million, seven hundred thirty-nine thousand, six hundred forty-three".