84217065 has 32 divisors (see below), whose sum is σ = 143410176. Its totient is φ = 42055680.

The previous prime is 84217061. The next prime is 84217087. The reversal of 84217065 is 56071248.

It is not a de Polignac number, because 84217065 - 2² = 84217061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84217061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56125 + ... + 57605.

It is an arithmetic number, because the mean of its divisors is an integer number (4481568).

Almost surely, 2^84217065 is an apocalyptic number.

84217065 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

84217065 is a deficient number, since it is larger than the sum of its proper divisors (59193111).

84217065 is a wasteful number, since it uses less digits than its factorization.

84217065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 84217065 is about 9176.9856162032. The cubic root of 84217065 is about 438.3288277362.

The spelling of 84217065 in words is "eighty-four million, two hundred seventeen thousand, sixty-five".