386691 has 8 divisors (see below), whose sum is σ = 519504. Its totient is φ = 255840.

The previous prime is 386689. The next prime is 386693. The reversal of 386691 is 196683.

It is an interprime number because it is at equal distance from previous prime (386689) and next prime (386693).

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

It is not a de Polignac number, because 386691 - 2¹ = 386689 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61 + ... + 881.

It is an arithmetic number, because the mean of its divisors is an integer number (64938).

2³⁸⁶⁶⁹¹ is an apocalyptic number.

386691 is a deficient number, since it is larger than the sum of its proper divisors (132813).

386691 is a wasteful number, since it uses less digits than its factorization.

386691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981.

The product of its digits is 7776, while the sum is 33.

The square root of 386691 is about 621.8448359519. The cubic root of 386691 is about 72.8542158433.

The spelling of 386691 in words is "three hundred eighty-six thousand, six hundred ninety-one".