389561893 has 4 divisors (see below), whose sum is σ = 445213600. Its totient is φ = 333910188.

The previous prime is 389561891. The next prime is 389561899. The reversal of 389561893 is 398165983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 389561893 - 2¹ = 389561891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 389561893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389561891) 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, 27825843 + ... + 27825856.

It is an arithmetic number, because the mean of its divisors is an integer number (111303400).

Almost surely, 2^389561893 is an apocalyptic number.

It is an amenable number.

389561893 is a deficient number, since it is larger than the sum of its proper divisors (55651707).

389561893 is an equidigital number, since it uses as much as digits as its factorization.

389561893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55651706.

The product of its digits is 1399680, while the sum is 52.

The square root of 389561893 is about 19737.3223361225. The cubic root of 389561893 is about 730.3406760422.

The spelling of 389561893 in words is "three hundred eighty-nine million, five hundred sixty-one thousand, eight hundred ninety-three".