389743819 has 8 divisors (see below), whose sum is σ = 412844688. Its totient is φ = 366662400.

The previous prime is 389743817. The next prime is 389743883. The reversal of 389743819 is 918347983.

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 389743819 - 2¹ = 389743817 is a prime.

It is a super-2 number, since 2×389743819² = 303800488897409522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389743813) 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, 66144 + ... + 71794.

It is an arithmetic number, because the mean of its divisors is an integer number (51605586).

Almost surely, 2^389743819 is an apocalyptic number.

389743819 is a deficient number, since it is larger than the sum of its proper divisors (23100869).

389743819 is a wasteful number, since it uses less digits than its factorization.

389743819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9725.

The product of its digits is 1306368, while the sum is 52.

The square root of 389743819 is about 19741.9304780460. The cubic root of 389743819 is about 730.4543484200.

The spelling of 389743819 in words is "three hundred eighty-nine million, seven hundred forty-three thousand, eight hundred nineteen".