84770217 has 12 divisors (see below), whose sum is σ = 139938240. Its totient is φ = 48440088.

The previous prime is 84770201. The next prime is 84770221. The reversal of 84770217 is 71207748.

It is not a de Polignac number, because 84770217 - 2⁴ = 84770201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84770017) 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, 672717 + ... + 672842.

It is an arithmetic number, because the mean of its divisors is an integer number (11661520).

Almost surely, 2^84770217 is an apocalyptic number.

It is an amenable number.

84770217 is a deficient number, since it is larger than the sum of its proper divisors (55168023).

84770217 is a wasteful number, since it uses less digits than its factorization.

84770217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345572 (or 1345569 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 84770217 is about 9207.0742910004. The cubic root of 84770217 is about 439.2864070242.

The spelling of 84770217 in words is "eighty-four million, seven hundred seventy thousand, two hundred seventeen".