84219172 has 12 divisors (see below), whose sum is σ = 155140720. Its totient is φ = 39893256.

The previous prime is 84219167. The next prime is 84219181. The reversal of 84219172 is 27191248.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553998 + ... + 554149.

Almost surely, 2^84219172 is an apocalyptic number.

It is an amenable number.

84219172 is a deficient number, since it is larger than the sum of its proper divisors (70921548).

84219172 is a wasteful number, since it uses less digits than its factorization.

84219172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108170 (or 1108168 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 84219172 is about 9177.1004135293. The cubic root of 84219172 is about 438.3324831756.

The spelling of 84219172 in words is "eighty-four million, two hundred nineteen thousand, one hundred seventy-two".