61443 has 6 divisors (see below), whose sum is σ = 88764. Its totient is φ = 40956.

The previous prime is 61441. The next prime is 61463. The reversal of 61443 is 34416.

It is not a de Polignac number, because 61443 - 2¹ = 61441 is a prime.

It is a zygodrome in base 2.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 61443.

It is not an unprimeable number, because it can be changed into a prime (61441) 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, 3405 + ... + 3422.

It is an arithmetic number, because the mean of its divisors is an integer number (14794).

2⁶¹⁴⁴³ is an apocalyptic number.

61443 is a deficient number, since it is larger than the sum of its proper divisors (27321).

61443 is a wasteful number, since it uses less digits than its factorization.

61443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6833 (or 6830 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 61443 is about 247.8769856199. The cubic root of 61443 is about 39.4600354216.

Subtracting from 61443 its sum of digits (18), we obtain a triangular number (61425 = T₃₅₀).

Adding to 61443 its reverse (34416), we get a palindrome (95859).

The spelling of 61443 in words is "sixty-one thousand, four hundred forty-three".