3706643 has 4 divisors (see below), whose sum is σ = 3792888. Its totient is φ = 3620400.

The previous prime is 3706631. The next prime is 3706649. The reversal of 3706643 is 3466073.

3706643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3706643 - 2⁴ = 3706627 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3706649) 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 3 ways as a sum of consecutive naturals, for example, 43058 + ... + 43143.

It is an arithmetic number, because the mean of its divisors is an integer number (948222).

Almost surely, 2^3706643 is an apocalyptic number.

3706643 is a deficient number, since it is larger than the sum of its proper divisors (86245).

3706643 is an equidigital number, since it uses as much as digits as its factorization.

3706643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86244.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 3706643 is about 1925.2643974270. The cubic root of 3706643 is about 154.7605459792.

The spelling of 3706643 in words is "three million, seven hundred six thousand, six hundred forty-three".