143613 has 14 divisors (see below), whose sum is σ = 216414. Its totient is φ = 95256.

The previous prime is 143609. The next prime is 143617. The reversal of 143613 is 316341.

It is an interprime number because it is at equal distance from previous prime (143609) and next prime (143617).

It can be written as a sum of positive squares in only one way, i.e., 142884 + 729 = 378^2 + 27^2 .

It is not a de Polignac number, because 143613 - 2² = 143609 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143613.

It is not an unprimeable number, because it can be changed into a prime (143617) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 631 + ... + 827.

2¹⁴³⁶¹³ is an apocalyptic number.

It is an amenable number.

143613 is a deficient number, since it is larger than the sum of its proper divisors (72801).

143613 is an frugal number, since it uses more digits than its factorization.

143613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 200 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 143613 is about 378.9630588857. The cubic root of 143613 is about 52.3678308075.

Adding to 143613 its reverse (316341), we get a palindrome (459954).

The spelling of 143613 in words is "one hundred forty-three thousand, six hundred thirteen".