84986917 has 4 divisors (see below), whose sum is σ = 85047820. Its totient is φ = 84926016.

The previous prime is 84986911. The next prime is 84986939. The reversal of 84986917 is 71968948.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28451556 + 56535361 = 5334^2 + 7519^2 .

It is a cyclic number.

It is not a de Polignac number, because 84986917 - 2⁷ = 84986789 is a prime.

It is a super-2 number, since 2×84986917² = 14445552122329778, 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 (84986911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28308 + ... + 31165.

It is an arithmetic number, because the mean of its divisors is an integer number (21261955).

Almost surely, 2^84986917 is an apocalyptic number.

It is an amenable number.

84986917 is a deficient number, since it is larger than the sum of its proper divisors (60903).

84986917 is a wasteful number, since it uses less digits than its factorization.

84986917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60902.

The product of its digits is 870912, while the sum is 52.

The square root of 84986917 is about 9218.8349046938. The cubic root of 84986917 is about 439.6604077358.

The spelling of 84986917 in words is "eighty-four million, nine hundred eighty-six thousand, nine hundred seventeen".