5671643 has 4 divisors (see below), whose sum is σ = 5696640. Its totient is φ = 5646648.

The previous prime is 5671621. The next prime is 5671649. The reversal of 5671643 is 3461765.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3461765 = 5 ⋅692353.

It is a cyclic number.

It is not a de Polignac number, because 5671643 - 2⁶ = 5671579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5671649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12155 + ... + 12612.

It is an arithmetic number, because the mean of its divisors is an integer number (1424160).

Almost surely, 2^5671643 is an apocalyptic number.

5671643 is a deficient number, since it is larger than the sum of its proper divisors (24997).

5671643 is a wasteful number, since it uses less digits than its factorization.

5671643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24996.

The product of its digits is 15120, while the sum is 32.

The square root of 5671643 is about 2381.5211525410. The cubic root of 5671643 is about 178.3348806651.

The spelling of 5671643 in words is "five million, six hundred seventy-one thousand, six hundred forty-three".