84118857 has 8 divisors (see below), whose sum is σ = 112740384. Its totient is φ = 55788288.

The previous prime is 84118819. The next prime is 84118877. The reversal of 84118857 is 75881148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84118857 - 2¹⁰ = 84117833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84118877) 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 7 ways as a sum of consecutive naturals, for example, 72063 + ... + 73220.

It is an arithmetic number, because the mean of its divisors is an integer number (14092548).

Almost surely, 2^84118857 is an apocalyptic number.

It is an amenable number.

84118857 is a deficient number, since it is larger than the sum of its proper divisors (28621527).

84118857 is a wasteful number, since it uses less digits than its factorization.

84118857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145479.

The product of its digits is 71680, while the sum is 42.

The square root of 84118857 is about 9171.6332787568. The cubic root of 84118857 is about 438.1583787450.

The spelling of 84118857 in words is "eighty-four million, one hundred eighteen thousand, eight hundred fifty-seven".