389120887 has 4 divisors (see below), whose sum is σ = 389639776. Its totient is φ = 388602000.

The previous prime is 389120881. The next prime is 389120917. The reversal of 389120887 is 788021983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788021983 = 7 ⋅112574569.

It is a cyclic number.

It is not a de Polignac number, because 389120887 - 2⁷ = 389120759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389120881) 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, 258318 + ... + 259819.

It is an arithmetic number, because the mean of its divisors is an integer number (97409944).

Almost surely, 2^389120887 is an apocalyptic number.

389120887 is a deficient number, since it is larger than the sum of its proper divisors (518889).

389120887 is an equidigital number, since it uses as much as digits as its factorization.

389120887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518888.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 389120887 is about 19726.1472923630. The cubic root of 389120887 is about 730.0649763894.

The spelling of 389120887 in words is "three hundred eighty-nine million, one hundred twenty thousand, eight hundred eighty-seven".