84772217 has 16 divisors (see below), whose sum is σ = 92695680. Its totient is φ = 77200128.

The previous prime is 84772213. The next prime is 84772223. The reversal of 84772217 is 71227748.

It is a happy number.

It is not a de Polignac number, because 84772217 - 2² = 84772213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84772211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192884 + ... + 193322.

It is an arithmetic number, because the mean of its divisors is an integer number (5793480).

Almost surely, 2^84772217 is an apocalyptic number.

It is an amenable number.

84772217 is a deficient number, since it is larger than the sum of its proper divisors (7923463).

84772217 is a wasteful number, since it uses less digits than its factorization.

84772217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800.

The product of its digits is 43904, while the sum is 38.

The square root of 84772217 is about 9207.1829024952. The cubic root of 84772217 is about 439.2898617199.

The spelling of 84772217 in words is "eighty-four million, seven hundred seventy-two thousand, two hundred seventeen".