84861984829 has 2 divisors, whose sum is σ = 84861984830. Its totient is φ = 84861984828.

The previous prime is 84861984763. The next prime is 84861984853. The reversal of 84861984829 is 92848916848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80271922329 + 4590062500 = 283323^2 + 67750^2 .

It is a cyclic number.

It is not a de Polignac number, because 84861984829 - 2¹⁷ = 84861853757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84861984859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42430992414 + 42430992415.

It is an arithmetic number, because the mean of its divisors is an integer number (42430992415).

Almost surely, 2^84861984829 is an apocalyptic number.

It is an amenable number.

84861984829 is a deficient number, since it is larger than the sum of its proper divisors (1).

84861984829 is an equidigital number, since it uses as much as digits as its factorization.

84861984829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63700992, while the sum is 67.

The spelling of 84861984829 in words is "eighty-four billion, eight hundred sixty-one million, nine hundred eighty-four thousand, eight hundred twenty-nine".