84136851 has 24 divisors (see below), whose sum is σ = 123928896. Its totient is φ = 54995760.

The previous prime is 84136849. The next prime is 84136903. The reversal of 84136851 is 15863148.

It is not a de Polignac number, because 84136851 - 2¹ = 84136849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84136831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121416 + ... + 122106.

It is an arithmetic number, because the mean of its divisors is an integer number (5163704).

Almost surely, 2^84136851 is an apocalyptic number.

84136851 is a deficient number, since it is larger than the sum of its proper divisors (39792045).

84136851 is a wasteful number, since it uses less digits than its factorization.

84136851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 940 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 84136851 is about 9172.6141857161. The cubic root of 84136851 is about 438.1896189054.

Adding to 84136851 its reverse (15863148), we get a palindrome (99999999).

The spelling of 84136851 in words is "eighty-four million, one hundred thirty-six thousand, eight hundred fifty-one".