3684991 has 4 divisors (see below), whose sum is σ = 3845232. Its totient is φ = 3524752.

The previous prime is 3684977. The next prime is 3685007. The reversal of 3684991 is 1994863.

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 3684991 - 2⁵ = 3684959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3684391) 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, 80086 + ... + 80131.

It is an arithmetic number, because the mean of its divisors is an integer number (961308).

Almost surely, 2^3684991 is an apocalyptic number.

3684991 is a deficient number, since it is larger than the sum of its proper divisors (160241).

3684991 is a wasteful number, since it uses less digits than its factorization.

3684991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160240.

The product of its digits is 46656, while the sum is 40.

The square root of 3684991 is about 1919.6330378486. The cubic root of 3684991 is about 154.4586176842.

The spelling of 3684991 in words is "three million, six hundred eighty-four thousand, nine hundred ninety-one".