379989 has 6 divisors (see below), whose sum is σ = 548886. Its totient is φ = 253320.

The previous prime is 379979. The next prime is 379993. The reversal of 379989 is 989973.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 378225 + 1764 = 615^2 + 42^2 .

It is not a de Polignac number, because 379989 - 2¹³ = 371797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (379909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21102 + ... + 21119.

It is an arithmetic number, because the mean of its divisors is an integer number (91481).

2³⁷⁹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

379989 is a deficient number, since it is larger than the sum of its proper divisors (168897).

379989 is a wasteful number, since it uses less digits than its factorization.

379989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42227 (or 42224 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 379989 is about 616.4324780542. The cubic root of 379989 is about 72.4308655266.

The spelling of 379989 in words is "three hundred seventy-nine thousand, nine hundred eighty-nine".