83443427261 has 2 divisors, whose sum is σ = 83443427262. Its totient is φ = 83443427260.

The previous prime is 83443427239. The next prime is 83443427279. The reversal of 83443427261 is 16272434438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83284188100 + 159239161 = 288590^2 + 12619^2 .

It is a cyclic number.

It is not a de Polignac number, because 83443427261 - 2³⁴ = 66263558077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83443429261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41721713630 + 41721713631.

It is an arithmetic number, because the mean of its divisors is an integer number (41721713631).

Almost surely, 2^83443427261 is an apocalyptic number.

It is an amenable number.

83443427261 is a deficient number, since it is larger than the sum of its proper divisors (1).

83443427261 is an equidigital number, since it uses as much as digits as its factorization.

83443427261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 44.

The spelling of 83443427261 in words is "eighty-three billion, four hundred forty-three million, four hundred twenty-seven thousand, two hundred sixty-one".