83129191 has 6 divisors (see below), whose sum is σ = 85109280. Its totient is φ = 81194148.

The previous prime is 83129173. The next prime is 83129203. The reversal of 83129191 is 19192138.

It is not a de Polignac number, because 83129191 - 2⁵ = 83129159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83129131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20631 + ... + 24328.

It is an arithmetic number, because the mean of its divisors is an integer number (14184880).

Almost surely, 2^83129191 is an apocalyptic number.

83129191 is a deficient number, since it is larger than the sum of its proper divisors (1980089).

83129191 is an equidigital number, since it uses as much as digits as its factorization.

83129191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45045 (or 45002 counting only the distinct ones).

The product of its digits is 3888, while the sum is 34.

The square root of 83129191 is about 9117.5210995094. The cubic root of 83129191 is about 436.4332712169.

The spelling of 83129191 in words is "eighty-three million, one hundred twenty-nine thousand, one hundred ninety-one".