83191661933 has 2 divisors, whose sum is σ = 83191661934. Its totient is φ = 83191661932.

The previous prime is 83191661923. The next prime is 83191661939. The reversal of 83191661933 is 33916619138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78670713289 + 4520948644 = 280483^2 + 67238^2 .

It is a cyclic number.

It is not a de Polignac number, because 83191661933 - 2³⁰ = 82117920109 is a prime.

It is a super-2 number, since 2×83191661933² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83191661939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41595830966 + 41595830967.

It is an arithmetic number, because the mean of its divisors is an integer number (41595830967).

Almost surely, 2^83191661933 is an apocalyptic number.

It is an amenable number.

83191661933 is a deficient number, since it is larger than the sum of its proper divisors (1).

83191661933 is an equidigital number, since it uses as much as digits as its factorization.

83191661933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 50.

The spelling of 83191661933 in words is "eighty-three billion, one hundred ninety-one million, six hundred sixty-one thousand, nine hundred thirty-three".