84198681 has 12 divisors (see below), whose sum is σ = 138994752. Its totient is φ = 48113496.

The previous prime is 84198659. The next prime is 84198683. The reversal of 84198681 is 18689148.

It is not a de Polignac number, because 84198681 - 2⁵ = 84198649 is a prime.

It is a super-2 number, since 2×84198681² = 14178835764279522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (84198683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 668181 + ... + 668306.

It is an arithmetic number, because the mean of its divisors is an integer number (11582896).

Almost surely, 2^84198681 is an apocalyptic number.

It is an amenable number.

84198681 is a deficient number, since it is larger than the sum of its proper divisors (54796071).

84198681 is a wasteful number, since it uses less digits than its factorization.

84198681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336500 (or 1336497 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 84198681 is about 9175.9839254436. The cubic root of 84198681 is about 438.2969307029.

It can be divided in two parts, 84 and 198681, that added together give a triangular number (198765 = T₆₃₀).

The spelling of 84198681 in words is "eighty-four million, one hundred ninety-eight thousand, six hundred eighty-one".