83644345 has 8 divisors (see below), whose sum is σ = 100435464. Its totient is φ = 66873984.

The previous prime is 83644339. The next prime is 83644357. The reversal of 83644345 is 54344638.

It can be written as a sum of positive squares in 4 ways, for example, as 2985984 + 80658361 = 1728^2 + 8981^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 83644345 - 2⁵ = 83644313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5797 + ... + 14173.

It is an arithmetic number, because the mean of its divisors is an integer number (12554433).

Almost surely, 2^83644345 is an apocalyptic number.

It is an amenable number.

83644345 is a deficient number, since it is larger than the sum of its proper divisors (16791119).

83644345 is a wasteful number, since it uses less digits than its factorization.

83644345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10379.

The product of its digits is 138240, while the sum is 37.

The square root of 83644345 is about 9145.7282378168. The cubic root of 83644345 is about 437.3329451996.

The spelling of 83644345 in words is "eighty-three million, six hundred forty-four thousand, three hundred forty-five".