543749 has 4 divisors (see below), whose sum is σ = 545664. Its totient is φ = 541836.

The previous prime is 543713. The next prime is 543769. The reversal of 543749 is 947345.

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 543749 - 2¹² = 539653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543769) 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, 437 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (136416).

2⁵⁴³⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

543749 is a deficient number, since it is larger than the sum of its proper divisors (1915).

543749 is a wasteful number, since it uses less digits than its factorization.

543749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914.

The product of its digits is 15120, while the sum is 32.

The square root of 543749 is about 737.3933821238. The cubic root of 543749 is about 81.6205450158.

The spelling of 543749 in words is "five hundred forty-three thousand, seven hundred forty-nine".