83644745 has 16 divisors (see below), whose sum is σ = 107153280. Its totient is φ = 62496000.

The previous prime is 83644723. The next prime is 83644793. The reversal of 83644745 is 54744638.

It is not a de Polignac number, because 83644745 - 2⁶ = 83644681 is a prime.

It is a super-2 number, since 2×83644745² = 13992886732230050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545 + ... + 12945.

It is an arithmetic number, because the mean of its divisors is an integer number (6697080).

Almost surely, 2^83644745 is an apocalyptic number.

It is an amenable number.

83644745 is a deficient number, since it is larger than the sum of its proper divisors (23508535).

83644745 is a wasteful number, since it uses less digits than its factorization.

83644745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12496.

The product of its digits is 322560, while the sum is 41.

The square root of 83644745 is about 9145.7501059235. The cubic root of 83644745 is about 437.3336423294. Note that the first 3 decimals are identical.

The spelling of 83644745 in words is "eighty-three million, six hundred forty-four thousand, seven hundred forty-five".