84198919 has 8 divisors (see below), whose sum is σ = 99545760. Its totient is φ = 69681696.

The previous prime is 84198869. The next prime is 84198923. The reversal of 84198919 is 91989148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84198919 - 2¹³ = 84190727 is a prime.

It is a super-2 number, since 2×84198919² = 14178915921537122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84198979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207184 + ... + 207589.

It is an arithmetic number, because the mean of its divisors is an integer number (12443220).

Almost surely, 2^84198919 is an apocalyptic number.

84198919 is a deficient number, since it is larger than the sum of its proper divisors (15346841).

84198919 is a wasteful number, since it uses less digits than its factorization.

84198919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414809.

The product of its digits is 186624, while the sum is 49.

The square root of 84198919 is about 9175.9968940710. The cubic root of 84198919 is about 438.2973436728.

The spelling of 84198919 in words is "eighty-four million, one hundred ninety-eight thousand, nine hundred nineteen".