84866517 has 6 divisors (see below), whose sum is σ = 122584982. Its totient is φ = 56577672.

The previous prime is 84866489. The next prime is 84866519. The reversal of 84866517 is 71566848.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 80030916 + 4835601 = 8946^2 + 2199^2 .

It is not a de Polignac number, because 84866517 - 2²⁰ = 83817941 is a prime.

It is a super-2 number, since 2×84866517² = 14404651415422578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84866519) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4714798 + ... + 4714815.

Almost surely, 2^84866517 is an apocalyptic number.

It is an amenable number.

84866517 is a deficient number, since it is larger than the sum of its proper divisors (37718465).

84866517 is a wasteful number, since it uses less digits than its factorization.

84866517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9429619 (or 9429616 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 84866517 is about 9212.3024809219. The cubic root of 84866517 is about 439.4526889786.

The spelling of 84866517 in words is "eighty-four million, eight hundred sixty-six thousand, five hundred seventeen".