83821043 has 2 divisors, whose sum is σ = 83821044. Its totient is φ = 83821042.

The previous prime is 83821013. The next prime is 83821063. The reversal of 83821043 is 34012838.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83821043 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 83820997 and 83821015.

It is not a weakly prime, because it can be changed into another prime (83821013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41910521 + 41910522.

It is an arithmetic number, because the mean of its divisors is an integer number (41910522).

Almost surely, 2^83821043 is an apocalyptic number.

83821043 is a deficient number, since it is larger than the sum of its proper divisors (1).

83821043 is an equidigital number, since it uses as much as digits as its factorization.

83821043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 83821043 is about 9155.3832797977. The cubic root of 83821043 is about 437.6406827027.

The spelling of 83821043 in words is "eighty-three million, eight hundred twenty-one thousand, forty-three".