83139081 has 8 divisors (see below), whose sum is σ = 113430240. Its totient is φ = 54136992.

The previous prime is 83139071. The next prime is 83139101. The reversal of 83139081 is 18093138.

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

It is not a de Polignac number, because 83139081 - 2⁹ = 83138569 is a prime.

It is a super-2 number, since 2×83139081² = 13824213579049122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83139071) 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, 322116 + ... + 322373.

It is an arithmetic number, because the mean of its divisors is an integer number (14178780).

Almost surely, 2^83139081 is an apocalyptic number.

It is an amenable number.

83139081 is a deficient number, since it is larger than the sum of its proper divisors (30291159).

83139081 is a wasteful number, since it uses less digits than its factorization.

83139081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644535.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 83139081 is about 9118.0634457104. The cubic root of 83139081 is about 436.4505782296.

The spelling of 83139081 in words is "eighty-three million, one hundred thirty-nine thousand, eighty-one".