386641921 has 8 divisors (see below), whose sum is σ = 388785600. Its totient is φ = 384504432.

The previous prime is 386641877. The next prime is 386641961. The reversal of 386641921 is 129146683.

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 386641921 - 2⁷ = 386641793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386641961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174406 + ... + 176608.

It is an arithmetic number, because the mean of its divisors is an integer number (48598200).

Almost surely, 2^386641921 is an apocalyptic number.

It is an amenable number.

386641921 is a deficient number, since it is larger than the sum of its proper divisors (2143679).

386641921 is a wasteful number, since it uses less digits than its factorization.

386641921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095.

The product of its digits is 62208, while the sum is 40.

The square root of 386641921 is about 19663.2123774321. The cubic root of 386641921 is about 728.5113348267.

The spelling of 386641921 in words is "three hundred eighty-six million, six hundred forty-one thousand, nine hundred twenty-one".