386650491 has 4 divisors (see below), whose sum is σ = 515533992. Its totient is φ = 257766992.

The previous prime is 386650489. The next prime is 386650543. The reversal of 386650491 is 194056683.

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

It is a cyclic number.

It is not a de Polignac number, because 386650491 - 2¹ = 386650489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (386650421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64441746 + ... + 64441751.

It is an arithmetic number, because the mean of its divisors is an integer number (128883498).

Almost surely, 2^386650491 is an apocalyptic number.

386650491 is a deficient number, since it is larger than the sum of its proper divisors (128883501).

386650491 is a wasteful number, since it uses less digits than its factorization.

386650491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128883500.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 386650491 is about 19663.4302958563. The cubic root of 386650491 is about 728.5167173229.

The spelling of 386650491 in words is "three hundred eighty-six million, six hundred fifty thousand, four hundred ninety-one".