6421673 has 8 divisors (see below), whose sum is σ = 6729600. Its totient is φ = 6119568.

The previous prime is 6421643. The next prime is 6421697. The reversal of 6421673 is 3761246.

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 6421673 - 2⁸ = 6421417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a d-powerful number, because it can be written as 6⁵ + 4¹¹ + 2¹³ + 1 + 6⁸ + 7³ + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6421643) 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 7 ways as a sum of consecutive naturals, for example, 890 + ... + 3692.

It is an arithmetic number, because the mean of its divisors is an integer number (841200).

Almost surely, 2^6421673 is an apocalyptic number.

It is an amenable number.

6421673 is a deficient number, since it is larger than the sum of its proper divisors (307927).

6421673 is a wasteful number, since it uses less digits than its factorization.

6421673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911.

The product of its digits is 6048, while the sum is 29.

The square root of 6421673 is about 2534.1020105749. The cubic root of 6421673 is about 185.8728946230.

The spelling of 6421673 in words is "six million, four hundred twenty-one thousand, six hundred seventy-three".