84001684 has 24 divisors (see below), whose sum is σ = 160486760. Its totient is φ = 38237184.

The previous prime is 84001669. The next prime is 84001693. The reversal of 84001684 is 48610048.

It can be written as a sum of positive squares in 4 ways, for example, as 20958084 + 63043600 = 4578^2 + 7940^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7269 + ... + 14860.

Almost surely, 2^84001684 is an apocalyptic number.

It is an amenable number.

84001684 is a deficient number, since it is larger than the sum of its proper divisors (76485076).

84001684 is a wasteful number, since it uses less digits than its factorization.

84001684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22219 (or 22217 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 84001684 is about 9165.2432591830. The cubic root of 84001684 is about 437.9548406003.

The spelling of 84001684 in words is "eighty-four million, one thousand, six hundred eighty-four".