3991683 has 8 divisors (see below), whose sum is σ = 5345296. Its totient is φ = 2649600.

The previous prime is 3991681. The next prime is 3991693. The reversal of 3991683 is 3861993.

3991683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3991683 - 2¹ = 3991681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3991681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2038 + ... + 3483.

It is an arithmetic number, because the mean of its divisors is an integer number (668162).

Almost surely, 2^3991683 is an apocalyptic number.

3991683 is a deficient number, since it is larger than the sum of its proper divisors (1353613).

3991683 is a wasteful number, since it uses less digits than its factorization.

3991683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765.

The product of its digits is 34992, while the sum is 39.

The square root of 3991683 is about 1997.9196680547. The cubic root of 3991683 is about 158.6300087343.

It can be divided in two parts, 399168 and 3, that added together give a triangular number (399171 = T₈₉₃).

The spelling of 3991683 in words is "three million, nine hundred ninety-one thousand, six hundred eighty-three".