389977 has 4 divisors (see below), whose sum is σ = 445696. Its totient is φ = 334260.

The previous prime is 389971. The next prime is 389981. The reversal of 389977 is 779983.

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 389977 - 2⁷ = 389849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389971) 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, 27849 + ... + 27862.

It is an arithmetic number, because the mean of its divisors is an integer number (111424).

2³⁸⁹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

389977 is a deficient number, since it is larger than the sum of its proper divisors (55719).

389977 is an equidigital number, since it uses as much as digits as its factorization.

389977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55718.

The product of its digits is 95256, while the sum is 43.

The square root of 389977 is about 624.4813848306. The cubic root of 389977 is about 73.0599994619.

The spelling of 389977 in words is "three hundred eighty-nine thousand, nine hundred seventy-seven".