83794645421 has 2 divisors, whose sum is σ = 83794645422. Its totient is φ = 83794645420.

The previous prime is 83794645381. The next prime is 83794645433. The reversal of 83794645421 is 12454649738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78640984900 + 5153660521 = 280430^2 + 71789^2 .

It is a cyclic number.

It is not a de Polignac number, because 83794645421 - 2⁶ = 83794645357 is a prime.

It is a super-2 number, since 2×83794645421² (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 (83794645471) 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, 41897322710 + 41897322711.

It is an arithmetic number, because the mean of its divisors is an integer number (41897322711).

Almost surely, 2^83794645421 is an apocalyptic number.

It is an amenable number.

83794645421 is a deficient number, since it is larger than the sum of its proper divisors (1).

83794645421 is an equidigital number, since it uses as much as digits as its factorization.

83794645421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 53.

The spelling of 83794645421 in words is "eighty-three billion, seven hundred ninety-four million, six hundred forty-five thousand, four hundred twenty-one".