387979 has 4 divisors (see below), whose sum is σ = 389376. Its totient is φ = 386584.

The previous prime is 387977. The next prime is 388009. The reversal of 387979 is 979783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979783 = 7 ⋅139969.

It is a cyclic number.

It is not a de Polignac number, because 387979 - 2¹ = 387977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387971) 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, 124 + ... + 889.

It is an arithmetic number, because the mean of its divisors is an integer number (97344).

2³⁸⁷⁹⁷⁹ is an apocalyptic number.

387979 is a deficient number, since it is larger than the sum of its proper divisors (1397).

387979 is a wasteful number, since it uses less digits than its factorization.

387979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396.

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

The square root of 387979 is about 622.8796031337. The cubic root of 387979 is about 72.9350144123.

It can be divided in two parts, 387 and 979, that multiplied together give a palindrome (378873).

The spelling of 387979 in words is "three hundred eighty-seven thousand, nine hundred seventy-nine".