83138081 has 4 divisors (see below), whose sum is σ = 89533332. Its totient is φ = 76742832.

The previous prime is 83138071. The next prime is 83138087. The reversal of 83138081 is 18083138.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31528225 + 51609856 = 5615^2 + 7184^2 .

It is a cyclic number.

It is not a de Polignac number, because 83138081 - 2⁶ = 83138017 is a prime.

It is a super-2 number, since 2×83138081² = 13823881024725122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83138087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197606 + ... + 3197631.

It is an arithmetic number, because the mean of its divisors is an integer number (22383333).

Almost surely, 2^83138081 is an apocalyptic number.

It is an amenable number.

83138081 is a deficient number, since it is larger than the sum of its proper divisors (6395251).

83138081 is a wasteful number, since it uses less digits than its factorization.

83138081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395250.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 83138081 is about 9118.0086093401. The cubic root of 83138081 is about 436.4488283412.

The spelling of 83138081 in words is "eighty-three million, one hundred thirty-eight thousand, eighty-one".