84198661829 has 4 divisors (see below), whose sum is σ = 84204504384. Its totient is φ = 84192819276.

The previous prime is 84198661801. The next prime is 84198661849. The reversal of 84198661829 is 92816689148.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84198661829 - 2³⁶ = 15479185093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84198661849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2899607 + ... + 2928500.

It is an arithmetic number, because the mean of its divisors is an integer number (21051126096).

Almost surely, 2^84198661829 is an apocalyptic number.

It is an amenable number.

84198661829 is a deficient number, since it is larger than the sum of its proper divisors (5842555).

84198661829 is a wasteful number, since it uses less digits than its factorization.

84198661829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5842554.

The product of its digits is 11943936, while the sum is 62.

The spelling of 84198661829 in words is "eighty-four billion, one hundred ninety-eight million, six hundred sixty-one thousand, eight hundred twenty-nine".