83621443 has 4 divisors (see below), whose sum is σ = 85881520. Its totient is φ = 81361368.

The previous prime is 83621441. The next prime is 83621459. The reversal of 83621443 is 34412638.

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 83621443 - 2¹ = 83621441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83621441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1129983 + ... + 1130056.

It is an arithmetic number, because the mean of its divisors is an integer number (21470380).

Almost surely, 2^83621443 is an apocalyptic number.

83621443 is a deficient number, since it is larger than the sum of its proper divisors (2260077).

83621443 is a wasteful number, since it uses less digits than its factorization.

83621443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260076.

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

The square root of 83621443 is about 9144.4760921553. The cubic root of 83621443 is about 437.2930273252.

The spelling of 83621443 in words is "eighty-three million, six hundred twenty-one thousand, four hundred forty-three".