84455217 has 60 divisors (see below), whose sum is σ = 158612608. Its totient is φ = 43837200.

The previous prime is 84455213. The next prime is 84455219. The reversal of 84455217 is 71255448.

It is not a de Polignac number, because 84455217 - 2² = 84455213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84455213) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 67992 + ... + 69222.

Almost surely, 2^84455217 is an apocalyptic number.

It is an amenable number.

84455217 is a deficient number, since it is larger than the sum of its proper divisors (74157391).

84455217 is a wasteful number, since it uses less digits than its factorization.

84455217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1252 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 84455217 is about 9189.9519585251. The cubic root of 84455217 is about 438.7416128136.

The spelling of 84455217 in words is "eighty-four million, four hundred fifty-five thousand, two hundred seventeen".