83821042 has 4 divisors (see below), whose sum is σ = 125731566. Its totient is φ = 41910520.

The previous prime is 83821013. The next prime is 83821043. The reversal of 83821042 is 24012838.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50424201 + 33396841 = 7101^2 + 5779^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 83821042.

It is not an unprimeable number, because it can be changed into a prime (83821043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20955259 + ... + 20955262.

Almost surely, 2^83821042 is an apocalyptic number.

83821042 is a deficient number, since it is larger than the sum of its proper divisors (41910524).

83821042 is a wasteful number, since it uses less digits than its factorization.

83821042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41910523.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 83821042 is about 9155.3832251851. The cubic root of 83821042 is about 437.6406809624.

The spelling of 83821042 in words is "eighty-three million, eight hundred twenty-one thousand, forty-two".