540979 has 4 divisors (see below), whose sum is σ = 543976. Its totient is φ = 537984.

The previous prime is 540961. The next prime is 540989. The reversal of 540979 is 979045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979045 = 5 ⋅195809.

It is a cyclic number.

It is not a de Polignac number, because 540979 - 2⁷ = 540851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1209 + ... + 1594.

It is an arithmetic number, because the mean of its divisors is an integer number (135994).

2⁵⁴⁰⁹⁷⁹ is an apocalyptic number.

540979 is a deficient number, since it is larger than the sum of its proper divisors (2997).

540979 is a wasteful number, since it uses less digits than its factorization.

540979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 540979 is about 735.5127463206. The cubic root of 540979 is about 81.4817101743.

The spelling of 540979 in words is "five hundred forty thousand, nine hundred seventy-nine".