540493 has 4 divisors (see below), whose sum is σ = 568960. Its totient is φ = 512028.

The previous prime is 540469. The next prime is 540509. The reversal of 540493 is 394045.

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, and also an emirpimes, since its reverse is a distinct semiprime: 394045 = 5 ⋅78809.

It is a cyclic number.

It is not a de Polignac number, because 540493 - 2⁵ = 540461 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540433) 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, 14205 + ... + 14242.

It is an arithmetic number, because the mean of its divisors is an integer number (142240).

2⁵⁴⁰⁴⁹³ is an apocalyptic number.

It is an amenable number.

540493 is a deficient number, since it is larger than the sum of its proper divisors (28467).

540493 is a wasteful number, since it uses less digits than its factorization.

540493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28466.

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

The square root of 540493 is about 735.1822903199. The cubic root of 540493 is about 81.4573025876.

The spelling of 540493 in words is "five hundred forty thousand, four hundred ninety-three".