386916991 has 8 divisors (see below), whose sum is σ = 409891104. Its totient is φ = 363966720.

The previous prime is 386916989. The next prime is 386916997. The reversal of 386916991 is 199619683.

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 386916991 - 2¹ = 386916989 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 (386916997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35926 + ... + 45436.

It is an arithmetic number, because the mean of its divisors is an integer number (51236388).

Almost surely, 2^386916991 is an apocalyptic number.

386916991 is a deficient number, since it is larger than the sum of its proper divisors (22974113).

386916991 is a wasteful number, since it uses less digits than its factorization.

386916991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11921.

The product of its digits is 629856, while the sum is 52.

The square root of 386916991 is about 19670.2056674555. The cubic root of 386916991 is about 728.6840563200.

The spelling of 386916991 in words is "three hundred eighty-six million, nine hundred sixteen thousand, nine hundred ninety-one".