83784634091 has 2 divisors, whose sum is σ = 83784634092. Its totient is φ = 83784634090.

The previous prime is 83784634069. The next prime is 83784634093. The reversal of 83784634091 is 19043648738.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83784634091 - 2¹⁰ = 83784633067 is a prime.

Together with 83784634093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83784634093) 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, 41892317045 + 41892317046.

It is an arithmetic number, because the mean of its divisors is an integer number (41892317046).

Almost surely, 2^83784634091 is an apocalyptic number.

83784634091 is a deficient number, since it is larger than the sum of its proper divisors (1).

83784634091 is an equidigital number, since it uses as much as digits as its factorization.

83784634091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 83784634091 in words is "eighty-three billion, seven hundred eighty-four million, six hundred thirty-four thousand, ninety-one".