84284987 has 4 divisors (see below), whose sum is σ = 84495576. Its totient is φ = 84074400.

The previous prime is 84284957. The next prime is 84284989. The reversal of 84284987 is 78948248.

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

It is a cyclic number.

It is not a de Polignac number, because 84284987 - 2⁸ = 84284731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84284989) 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, 104693 + ... + 105494.

It is an arithmetic number, because the mean of its divisors is an integer number (21123894).

Almost surely, 2^84284987 is an apocalyptic number.

84284987 is a deficient number, since it is larger than the sum of its proper divisors (210589).

84284987 is a wasteful number, since it uses less digits than its factorization.

84284987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210588.

The product of its digits is 1032192, while the sum is 50.

The square root of 84284987 is about 9180.6855408515. The cubic root of 84284987 is about 438.4466350965.

The spelling of 84284987 in words is "eighty-four million, two hundred eighty-four thousand, nine hundred eighty-seven".