83853681 has 8 divisors (see below), whose sum is σ = 113220480. Its totient is φ = 55194672.

The previous prime is 83853677. The next prime is 83853683. The reversal of 83853681 is 18635838.

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

It is not a de Polignac number, because 83853681 - 2² = 83853677 is a prime.

It is a super-2 number, since 2×83853681² = 14062879634499522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (83853683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176670 + ... + 177143.

It is an arithmetic number, because the mean of its divisors is an integer number (14152560).

Almost surely, 2^83853681 is an apocalyptic number.

83853681 is the 5792-nd centered pentagonal number.

It is an amenable number.

83853681 is a deficient number, since it is larger than the sum of its proper divisors (29366799).

83853681 is a wasteful number, since it uses less digits than its factorization.

83853681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353895.

The product of its digits is 138240, while the sum is 42.

The square root of 83853681 is about 9157.1655549084. The cubic root of 83853681 is about 437.6974777611.

The spelling of 83853681 in words is "eighty-three million, eight hundred fifty-three thousand, six hundred eighty-one".