389465819 has 4 divisors (see below), whose sum is σ = 409964040. Its totient is φ = 368967600.

The previous prime is 389465809. The next prime is 389465833. The reversal of 389465819 is 918564983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918564983 = 7 ⋅131223569.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389465819 is a prime.

It is a super-2 number, since 2×389465819² = 303367248338681522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389465809) 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, 10249082 + ... + 10249119.

It is an arithmetic number, because the mean of its divisors is an integer number (102491010).

Almost surely, 2^389465819 is an apocalyptic number.

389465819 is a deficient number, since it is larger than the sum of its proper divisors (20498221).

389465819 is a wasteful number, since it uses less digits than its factorization.

389465819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20498220.

The product of its digits is 1866240, while the sum is 53.

The square root of 389465819 is about 19734.8883705989. Note that the first 3 decimals coincide. The cubic root of 389465819 is about 730.2806320797.

The spelling of 389465819 in words is "three hundred eighty-nine million, four hundred sixty-five thousand, eight hundred nineteen".