84851217 has 12 divisors (see below), whose sum is σ = 133705104. Its totient is φ = 51424920.

The previous prime is 84851213. The next prime is 84851219. The reversal of 84851217 is 71215848.

It is not a de Polignac number, because 84851217 - 2² = 84851213 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (84851213) 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, 428443 + ... + 428640.

It is an arithmetic number, because the mean of its divisors is an integer number (11142092).

Almost surely, 2^84851217 is an apocalyptic number.

It is an amenable number.

84851217 is a deficient number, since it is larger than the sum of its proper divisors (48853887).

84851217 is a wasteful number, since it uses less digits than its factorization.

84851217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857100 (or 857097 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 84851217 is about 9211.4720321998. The cubic root of 84851217 is about 439.4262787583.

The spelling of 84851217 in words is "eighty-four million, eight hundred fifty-one thousand, two hundred seventeen".