84987539 has 32 divisors (see below), whose sum is σ = 111839616. Its totient is φ = 62668800.

The previous prime is 84987521. The next prime is 84987571. The reversal of 84987539 is 93578948.

It is a de Polignac number, because none of the positive numbers 2^k-84987539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84987509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211739 + ... + 212139.

It is an arithmetic number, because the mean of its divisors is an integer number (3494988).

Almost surely, 2^84987539 is an apocalyptic number.

84987539 is a deficient number, since it is larger than the sum of its proper divisors (26852077).

84987539 is a wasteful number, since it uses less digits than its factorization.

84987539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575.

The product of its digits is 2177280, while the sum is 53.

The square root of 84987539 is about 9218.8686399146. The cubic root of 84987539 is about 439.6614803248.

It can be divided in two parts, 849 and 87539, that added together give a palindrome (88388).

The spelling of 84987539 in words is "eighty-four million, nine hundred eighty-seven thousand, five hundred thirty-nine".