83840129 has 8 divisors (see below), whose sum is σ = 87583680. Its totient is φ = 80104816.

The previous prime is 83840123. The next prime is 83840143. The reversal of 83840129 is 92104838.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83840129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83840123) 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, 28667 + ... + 31455.

It is an arithmetic number, because the mean of its divisors is an integer number (10947960).

Almost surely, 2^83840129 is an apocalyptic number.

It is an amenable number.

83840129 is a deficient number, since it is larger than the sum of its proper divisors (3743551).

83840129 is a wasteful number, since it uses less digits than its factorization.

83840129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 83840129 is about 9156.4255580439. The cubic root of 83840129 is about 437.6738970201.

The spelling of 83840129 in words is "eighty-three million, eight hundred forty thousand, one hundred twenty-nine".