83808381 has 8 divisors (see below), whose sum is σ = 112005504. Its totient is φ = 55741760.

The previous prime is 83808349. The next prime is 83808383. The reversal of 83808381 is 18380838.

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

It is a cyclic number.

It is not a de Polignac number, because 83808381 - 2⁵ = 83808349 is a prime.

It is a super-2 number, since 2×83808381² = 14047689451682322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83808383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31116 + ... + 33701.

It is an arithmetic number, because the mean of its divisors is an integer number (14000688).

Almost surely, 2^83808381 is an apocalyptic number.

It is an amenable number.

83808381 is a deficient number, since it is larger than the sum of its proper divisors (28197123).

83808381 is a wasteful number, since it uses less digits than its factorization.

83808381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65251.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 83808381 is about 9154.6917479509. The cubic root of 83808381 is about 437.6186449376.

It can be divided in two parts, 8380 and 8381, that added together give a palindrome (16761).

The spelling of 83808381 in words is "eighty-three million, eight hundred eight thousand, three hundred eighty-one".