84373280809 has 2 divisors, whose sum is σ = 84373280810. Its totient is φ = 84373280808.

The previous prime is 84373280711. The next prime is 84373280819. The reversal of 84373280809 is 90808237348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78927283600 + 5445997209 = 280940^2 + 73797^2 .

It is a cyclic number.

It is not a de Polignac number, because 84373280809 - 2¹⁵ = 84373248041 is a prime.

It is not a weakly prime, because it can be changed into another prime (84373280819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42186640404 + 42186640405.

It is an arithmetic number, because the mean of its divisors is an integer number (42186640405).

Almost surely, 2^84373280809 is an apocalyptic number.

It is an amenable number.

84373280809 is a deficient number, since it is larger than the sum of its proper divisors (1).

84373280809 is an equidigital number, since it uses as much as digits as its factorization.

84373280809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 84373280809 in words is "eighty-four billion, three hundred seventy-three million, two hundred eighty thousand, eight hundred nine".