83331905 has 4 divisors (see below), whose sum is σ = 99998292. Its totient is φ = 66665520.

The previous prime is 83331901. The next prime is 83331907. The reversal of 83331905 is 50913338.

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 11895601 + 71436304 = 3449^2 + 8452^2 .

It is not a de Polignac number, because 83331905 - 2² = 83331901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83331901) 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, 8333186 + ... + 8333195.

It is an arithmetic number, because the mean of its divisors is an integer number (24999573).

Almost surely, 2^83331905 is an apocalyptic number.

It is an amenable number.

83331905 is a deficient number, since it is larger than the sum of its proper divisors (16666387).

83331905 is a wasteful number, since it uses less digits than its factorization.

83331905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666386.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 83331905 is about 9128.6310583789. The cubic root of 83331905 is about 436.7877368257.

The spelling of 83331905 in words is "eighty-three million, three hundred thirty-one thousand, nine hundred five".