386931 has 8 divisors (see below), whose sum is σ = 521424. Its totient is φ = 255200.

The previous prime is 386927. The next prime is 386963. The reversal of 386931 is 139683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 386931 - 2² = 386927 is a prime.

It is a super-2 number, since 2×386931² = 299431197522, which contains 22 as substring.

386931 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (386921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336 + ... + 941.

It is an arithmetic number, because the mean of its divisors is an integer number (65178).

2³⁸⁶⁹³¹ is an apocalyptic number.

386931 is a deficient number, since it is larger than the sum of its proper divisors (134493).

386931 is a wasteful number, since it uses less digits than its factorization.

386931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381.

The product of its digits is 3888, while the sum is 30.

The square root of 386931 is about 622.0377802031. The cubic root of 386931 is about 72.8692850637.

The spelling of 386931 in words is "three hundred eighty-six thousand, nine hundred thirty-one".