63845 has 6 divisors (see below), whose sum is σ = 77298. Its totient is φ = 50624.

The previous prime is 63841. The next prime is 63853. The reversal of 63845 is 54836.

It can be written as a sum of positive squares in 3 ways, for example, as 6724 + 57121 = 82^2 + 239^2 .

It is not a de Polignac number, because 63845 - 2² = 63841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 509 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (12883).

2⁶³⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

63845 is a deficient number, since it is larger than the sum of its proper divisors (13453).

63845 is an equidigital number, since it uses as much as digits as its factorization.

63845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 118 counting only the distinct ones).

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

The square root of 63845 is about 252.6756814575. The cubic root of 63845 is about 39.9676822294.

Multiplying 63845 by its product of digits (2880), we get a square (183873600 = 13560²).

Subtracting from 63845 its reverse (54836), we obtain a palindrome (9009).

It can be divided in two parts, 63 and 845, that multiplied together give a palindrome (53235).

The spelling of 63845 in words is "sixty-three thousand, eight hundred forty-five".