84928987 has 16 divisors (see below), whose sum is σ = 100382688. Its totient is φ = 70836480.

The previous prime is 84928969. The next prime is 84928997. The reversal of 84928987 is 78982948.

It is not a de Polignac number, because 84928987 - 2¹⁹ = 84404699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84928927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23023 + ... + 26455.

It is an arithmetic number, because the mean of its divisors is an integer number (6273918).

Almost surely, 2^84928987 is an apocalyptic number.

84928987 is a deficient number, since it is larger than the sum of its proper divisors (15453701).

84928987 is a wasteful number, since it uses less digits than its factorization.

84928987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630.

The product of its digits is 2322432, while the sum is 55.

The square root of 84928987 is about 9215.6924319337. The cubic root of 84928987 is about 439.5604891542.

The spelling of 84928987 in words is "eighty-four million, nine hundred twenty-eight thousand, nine hundred eighty-seven".