83112681 has 4 divisors (see below), whose sum is σ = 110816912. Its totient is φ = 55408452.

The previous prime is 83112649. The next prime is 83112703. The reversal of 83112681 is 18621138.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 83112681 - 2⁵ = 83112649 is a prime.

It is a super-2 number, since 2×83112681² = 13815435486015522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83112611) 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, 13852111 + ... + 13852116.

It is an arithmetic number, because the mean of its divisors is an integer number (27704228).

Almost surely, 2^83112681 is an apocalyptic number.

It is an amenable number.

83112681 is a deficient number, since it is larger than the sum of its proper divisors (27704231).

83112681 is a wasteful number, since it uses less digits than its factorization.

83112681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27704230.

The product of its digits is 2304, while the sum is 30.

The square root of 83112681 is about 9116.6156549456. The cubic root of 83112681 is about 436.4043764717.

The spelling of 83112681 in words is "eighty-three million, one hundred twelve thousand, six hundred eighty-one".