83443918 has 4 divisors (see below), whose sum is σ = 125165880. Its totient is φ = 41721958.

The previous prime is 83443903. The next prime is 83443937. The reversal of 83443918 is 81934438.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81934438 = 2 ⋅40967219.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20860978 + ... + 20860981.

It is an arithmetic number, because the mean of its divisors is an integer number (31291470).

Almost surely, 2^83443918 is an apocalyptic number.

83443918 is a deficient number, since it is larger than the sum of its proper divisors (41721962).

83443918 is a wasteful number, since it uses less digits than its factorization.

83443918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41721961.

The product of its digits is 82944, while the sum is 40.

The square root of 83443918 is about 9134.7642553051. The cubic root of 83443918 is about 436.9833561762.

The spelling of 83443918 in words is "eighty-three million, four hundred forty-three thousand, nine hundred eighteen".