386217939 has 4 divisors (see below), whose sum is σ = 514957256. Its totient is φ = 257478624.

The previous prime is 386217913. The next prime is 386217947. The reversal of 386217939 is 939712683.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 386217939 - 2⁵ = 386217907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386217989) 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, 64369654 + ... + 64369659.

It is an arithmetic number, because the mean of its divisors is an integer number (128739314).

Almost surely, 2^386217939 is an apocalyptic number.

386217939 is a deficient number, since it is larger than the sum of its proper divisors (128739317).

386217939 is a wasteful number, since it uses less digits than its factorization.

386217939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128739316.

The product of its digits is 489888, while the sum is 48.

The square root of 386217939 is about 19652.4283232378. The cubic root of 386217939 is about 728.2449482413.

The spelling of 386217939 in words is "three hundred eighty-six million, two hundred seventeen thousand, nine hundred thirty-nine".