83821442 has 8 divisors (see below), whose sum is σ = 127793532. Its totient is φ = 41223600.

The previous prime is 83821417. The next prime is 83821469. The reversal of 83821442 is 24412838.

It can be written as a sum of positive squares in 2 ways, for example, as 77774761 + 6046681 = 8819^2 + 2459^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 83821399 and 83821408.

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 in 3 ways as a sum of consecutive naturals, for example, 343409 + ... + 343652.

Almost surely, 2^83821442 is an apocalyptic number.

83821442 is a deficient number, since it is larger than the sum of its proper divisors (43972090).

83821442 is a wasteful number, since it uses less digits than its factorization.

83821442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687124.

The product of its digits is 12288, while the sum is 32.

The square root of 83821442 is about 9155.4050702304. The cubic root of 83821442 is about 437.6413771121.

The spelling of 83821442 in words is "eighty-three million, eight hundred twenty-one thousand, four hundred forty-two".