386642999 has 4 divisors (see below), whose sum is σ = 386757000. Its totient is φ = 386529000.

The previous prime is 386642987. The next prime is 386643011. The reversal of 386642999 is 999246683.

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

It is an interprime number because it is at equal distance from previous prime (386642987) and next prime (386643011).

It is a cyclic number.

It is not a de Polignac number, because 386642999 - 2⁴ = 386642983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386642929) 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, 51752 + ... + 58749.

It is an arithmetic number, because the mean of its divisors is an integer number (96689250).

Almost surely, 2^386642999 is an apocalyptic number.

386642999 is a deficient number, since it is larger than the sum of its proper divisors (114001).

386642999 is a wasteful number, since it uses less digits than its factorization.

386642999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114000.

The product of its digits is 5038848, while the sum is 56.

The square root of 386642999 is about 19663.2397890073. The cubic root of 386642999 is about 728.5120118826.

The spelling of 386642999 in words is "three hundred eighty-six million, six hundred forty-two thousand, nine hundred ninety-nine".