82478491273 has 2 divisors, whose sum is σ = 82478491274. Its totient is φ = 82478491272.

The previous prime is 82478491231. The next prime is 82478491339. The reversal of 82478491273 is 37219487428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65072438649 + 17406052624 = 255093^2 + 131932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82478491273 is a prime.

It is not a weakly prime, because it can be changed into another prime (82478491373) 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, 41239245636 + 41239245637.

It is an arithmetic number, because the mean of its divisors is an integer number (41239245637).

Almost surely, 2^82478491273 is an apocalyptic number.

It is an amenable number.

82478491273 is a deficient number, since it is larger than the sum of its proper divisors (1).

82478491273 is an equidigital number, since it uses as much as digits as its factorization.

82478491273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 55.

The spelling of 82478491273 in words is "eighty-two billion, four hundred seventy-eight million, four hundred ninety-one thousand, two hundred seventy-three".