540993 has 4 divisors (see below), whose sum is σ = 721328. Its totient is φ = 360660.

The previous prime is 540989. The next prime is 541001. The reversal of 540993 is 399045.

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 not a de Polignac number, because 540993 - 2² = 540989 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 540993.

It is not an unprimeable number, because it can be changed into a prime (541993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90163 + ... + 90168.

It is an arithmetic number, because the mean of its divisors is an integer number (180332).

2⁵⁴⁰⁹⁹³ is an apocalyptic number.

It is an amenable number.

540993 is a deficient number, since it is larger than the sum of its proper divisors (180335).

540993 is a wasteful number, since it uses less digits than its factorization.

540993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180334.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 540993 is about 735.5222634292. The cubic root of 540993 is about 81.4824130569.

The spelling of 540993 in words is "five hundred forty thousand, nine hundred ninety-three".