540012989 has 4 divisors (see below), whose sum is σ = 540064320. Its totient is φ = 539961660.

The previous prime is 540012971. The next prime is 540012997. The reversal of 540012989 is 989210045.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540012989 is a prime.

It is a super-2 number, since 2×540012989² = 583228056577428242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540018989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3509 + ... + 33050.

It is an arithmetic number, because the mean of its divisors is an integer number (135016080).

Almost surely, 2^540012989 is an apocalyptic number.

It is an amenable number.

540012989 is a deficient number, since it is larger than the sum of its proper divisors (51331).

540012989 is a wasteful number, since it uses less digits than its factorization.

540012989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51330.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 540012989 is about 23238.1795543455. The cubic root of 540012989 is about 814.3318141058.

The spelling of 540012989 in words is "five hundred forty million, twelve thousand, nine hundred eighty-nine".