386979 has 4 divisors (see below), whose sum is σ = 515976. Its totient is φ = 257984.

The previous prime is 386977. The next prime is 386987. The reversal of 386979 is 979683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979683 = 3 ⋅326561.

It is a cyclic number.

It is not a de Polignac number, because 386979 - 2¹ = 386977 is a prime.

It is a D-number.

386979 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 386979.

It is not an unprimeable number, because it can be changed into a prime (386977) 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, 64494 + ... + 64499.

It is an arithmetic number, because the mean of its divisors is an integer number (128994).

2³⁸⁶⁹⁷⁹ is an apocalyptic number.

386979 is a deficient number, since it is larger than the sum of its proper divisors (128997).

386979 is a wasteful number, since it uses less digits than its factorization.

386979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128996.

The product of its digits is 81648, while the sum is 42.

The square root of 386979 is about 622.0763618721. The cubic root of 386979 is about 72.8722981599.

Subtracting 386979 from its reverse (979683), we obtain a cube (592704 = 84³).

The spelling of 386979 in words is "three hundred eighty-six thousand, nine hundred seventy-nine".