84987651 has 16 divisors (see below), whose sum is σ = 132518144. Its totient is φ = 47434464.

The previous prime is 84987649. The next prime is 84987659. The reversal of 84987651 is 15678948.

It is not a de Polignac number, because 84987651 - 2¹ = 84987649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84987651.

It is not an unprimeable number, because it can be changed into a prime (84987659) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 46156 + ... + 47961.

It is an arithmetic number, because the mean of its divisors is an integer number (8282384).

Almost surely, 2^84987651 is an apocalyptic number.

84987651 is a deficient number, since it is larger than the sum of its proper divisors (47530493).

84987651 is a wasteful number, since it uses less digits than its factorization.

84987651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94170.

The product of its digits is 483840, while the sum is 48.

The square root of 84987651 is about 9218.8747144106. The cubic root of 84987651 is about 439.6616734592.

The spelling of 84987651 in words is "eighty-four million, nine hundred eighty-seven thousand, six hundred fifty-one".