616543 has 4 divisors (see below), whose sum is σ = 619200. Its totient is φ = 613888.

The previous prime is 616537. The next prime is 616547. The reversal of 616543 is 345616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616543 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943 + ... + 1456.

It is an arithmetic number, because the mean of its divisors is an integer number (154800).

2⁶¹⁶⁵⁴³ is an apocalyptic number.

616543 is a deficient number, since it is larger than the sum of its proper divisors (2657).

616543 is a wasteful number, since it uses less digits than its factorization.

616543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656.

The product of its digits is 2160, while the sum is 25.

The square root of 616543 is about 785.2025216465. The cubic root of 616543 is about 85.1114110013. Note that the first 3 decimals are identical.

The spelling of 616543 in words is "six hundred sixteen thousand, five hundred forty-three".