83420111 has 2 divisors, whose sum is σ = 83420112. Its totient is φ = 83420110.

The previous prime is 83420107. The next prime is 83420119. The reversal of 83420111 is 11102438.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83420111 - 2² = 83420107 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83420119) 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 as a sum of consecutive naturals, namely, 41710055 + 41710056.

It is an arithmetic number, because the mean of its divisors is an integer number (41710056).

Almost surely, 2^83420111 is an apocalyptic number.

83420111 is a deficient number, since it is larger than the sum of its proper divisors (1).

83420111 is an equidigital number, since it uses as much as digits as its factorization.

83420111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 83420111 is about 9133.4610635837. The cubic root of 83420111 is about 436.9417943203.

Adding to 83420111 its reverse (11102438), we get a palindrome (94522549).

The spelling of 83420111 in words is "eighty-three million, four hundred twenty thousand, one hundred eleven".