3671643 has 8 divisors (see below), whose sum is σ = 5183568. Its totient is φ = 2303744.

The previous prime is 3671627. The next prime is 3671663. The reversal of 3671643 is 3461763.

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 3671643 - 2⁴ = 3671627 is a prime.

3671643 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3671643.

It is not an unprimeable number, because it can be changed into a prime (3671663) 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, 35946 + ... + 36047.

It is an arithmetic number, because the mean of its divisors is an integer number (647946).

Almost surely, 2^3671643 is an apocalyptic number.

3671643 is a deficient number, since it is larger than the sum of its proper divisors (1511925).

3671643 is a wasteful number, since it uses less digits than its factorization.

3671643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72013.

The product of its digits is 9072, while the sum is 30.

The square root of 3671643 is about 1916.1531775931. The cubic root of 3671643 is about 154.2718955633.

Subtracting from 3671643 its product of digits (9072), we obtain a triangular number (3662571 = T₂₇₀₆).

The spelling of 3671643 in words is "three million, six hundred seventy-one thousand, six hundred forty-three".