543961 has 4 divisors (see below), whose sum is σ = 593424. Its totient is φ = 494500.

The previous prime is 543929. The next prime is 543967. The reversal of 543961 is 169345.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 543961 - 2⁵ = 543929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (543967) 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, 24715 + ... + 24736.

It is an arithmetic number, because the mean of its divisors is an integer number (148356).

2⁵⁴³⁹⁶¹ is an apocalyptic number.

It is an amenable number.

543961 is a deficient number, since it is larger than the sum of its proper divisors (49463).

543961 is a wasteful number, since it uses less digits than its factorization.

543961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49462.

The product of its digits is 3240, while the sum is 28.

The square root of 543961 is about 737.5371177100. The cubic root of 543961 is about 81.6311512007.

The spelling of 543961 in words is "five hundred forty-three thousand, nine hundred sixty-one".