83807819 has 2 divisors, whose sum is σ = 83807820. Its totient is φ = 83807818.

The previous prime is 83807809. The next prime is 83807827. The reversal of 83807819 is 91870838.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83807819 - 2¹² = 83803723 is a prime.

It is a super-2 number, since 2×83807819² = 14047501051073522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_4878467 and since 83807819 and 4878467 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83807819.

It is not a weakly prime, because it can be changed into another prime (83807809) 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, 41903909 + 41903910.

It is an arithmetic number, because the mean of its divisors is an integer number (41903910).

Almost surely, 2^83807819 is an apocalyptic number.

83807819 is a deficient number, since it is larger than the sum of its proper divisors (1).

83807819 is an equidigital number, since it uses as much as digits as its factorization.

83807819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 83807819 is about 9154.6610532559. The cubic root of 83807819 is about 437.6176667449.

The spelling of 83807819 in words is "eighty-three million, eight hundred seven thousand, eight hundred nineteen".