83645 has 4 divisors (see below), whose sum is σ = 100380. Its totient is φ = 66912.

The previous prime is 83641. The next prime is 83653. The reversal of 83645 is 54638.

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 42436 + 41209 = 206^2 + 203^2 .

It is a cyclic number.

It is not a de Polignac number, because 83645 - 2² = 83641 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83641) 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, 8360 + ... + 8369.

It is an arithmetic number, because the mean of its divisors is an integer number (25095).

2⁸³⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

83645 is a deficient number, since it is larger than the sum of its proper divisors (16735).

83645 is a wasteful number, since it uses less digits than its factorization.

83645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16734.

The product of its digits is 2880, while the sum is 26.

The square root of 83645 is about 289.2144533041. The cubic root of 83645 is about 43.7334086748.

It can be divided in two parts, 83 and 645, that multiplied together give a palindrome (53535).

The spelling of 83645 in words is "eighty-three thousand, six hundred forty-five".