84684986 has 4 divisors (see below), whose sum is σ = 127027482. Its totient is φ = 42342492.

The previous prime is 84684961. The next prime is 84684991. The reversal of 84684986 is 68948648.

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

It can be written as a sum of positive squares in only one way, i.e., 42837025 + 41847961 = 6545^2 + 6469^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21171245 + ... + 21171248.

Almost surely, 2^84684986 is an apocalyptic number.

84684986 is a deficient number, since it is larger than the sum of its proper divisors (42342496).

84684986 is a wasteful number, since it uses less digits than its factorization.

84684986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42342495.

The product of its digits is 2654208, while the sum is 53.

The square root of 84684986 is about 9202.4445665269. Note that the first 3 decimals coincide. The cubic root of 84684986 is about 439.1391329138.

The spelling of 84684986 in words is "eighty-four million, six hundred eighty-four thousand, nine hundred eighty-six".