83644563 has 8 divisors (see below), whose sum is σ = 111571408. Its totient is φ = 55740384.

The previous prime is 83644559. The next prime is 83644567. The reversal of 83644563 is 36544638.

It is an interprime number because it is at equal distance from previous prime (83644559) and next prime (83644567).

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

It is not a de Polignac number, because 83644563 - 2² = 83644559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83644567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6981 + ... + 14697.

It is an arithmetic number, because the mean of its divisors is an integer number (13946426).

Almost surely, 2^83644563 is an apocalyptic number.

83644563 is a deficient number, since it is larger than the sum of its proper divisors (27926845).

83644563 is a wasteful number, since it uses less digits than its factorization.

83644563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11333.

The product of its digits is 207360, while the sum is 39.

The square root of 83644563 is about 9145.7401559415. The cubic root of 83644563 is about 437.3333251356. Note that the first 4 decimals are identical.

The spelling of 83644563 in words is "eighty-three million, six hundred forty-four thousand, five hundred sixty-three".