83393044921 has 2 divisors, whose sum is σ = 83393044922. Its totient is φ = 83393044920.

The previous prime is 83393044871. The next prime is 83393045009. The reversal of 83393044921 is 12944039338.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50281783696 + 33111261225 = 224236^2 + 181965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83393044921 is a prime.

It is not a weakly prime, because it can be changed into another prime (83393044421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41696522460 + 41696522461.

It is an arithmetic number, because the mean of its divisors is an integer number (41696522461).

Almost surely, 2^83393044921 is an apocalyptic number.

It is an amenable number.

83393044921 is a deficient number, since it is larger than the sum of its proper divisors (1).

83393044921 is an equidigital number, since it uses as much as digits as its factorization.

83393044921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 83393044921 in words is "eighty-three billion, three hundred ninety-three million, forty-four thousand, nine hundred twenty-one".