83421643 has 8 divisors (see below), whose sum is σ = 85896720. Its totient is φ = 80958240.

The previous prime is 83421641. The next prime is 83421691. The reversal of 83421643 is 34612438.

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 83421643 - 2¹ = 83421641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83421641) 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, 12813 + ... + 18193.

It is an arithmetic number, because the mean of its divisors is an integer number (10737090).

Almost surely, 2^83421643 is an apocalyptic number.

83421643 is a deficient number, since it is larger than the sum of its proper divisors (2475077).

83421643 is a wasteful number, since it uses less digits than its factorization.

83421643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5837.

The product of its digits is 13824, while the sum is 31.

The square root of 83421643 is about 9133.5449306389. The cubic root of 83421643 is about 436.9444690979.

The spelling of 83421643 in words is "eighty-three million, four hundred twenty-one thousand, six hundred forty-three".