83556286973 has 2 divisors, whose sum is σ = 83556286974. Its totient is φ = 83556286972.

The previous prime is 83556286967. The next prime is 83556286981. The reversal of 83556286973 is 37968265538.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80019962884 + 3536324089 = 282878^2 + 59467^2 .

It is a cyclic number.

It is not a de Polignac number, because 83556286973 - 2⁸ = 83556286717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83556286273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41778143486 + 41778143487.

It is an arithmetic number, because the mean of its divisors is an integer number (41778143487).

Almost surely, 2^83556286973 is an apocalyptic number.

It is an amenable number.

83556286973 is a deficient number, since it is larger than the sum of its proper divisors (1).

83556286973 is an equidigital number, since it uses as much as digits as its factorization.

83556286973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65318400, while the sum is 62.

The spelling of 83556286973 in words is "eighty-three billion, five hundred fifty-six million, two hundred eighty-six thousand, nine hundred seventy-three".