540975643 has 4 divisors (see below), whose sum is σ = 582589168. Its totient is φ = 499362120.

The previous prime is 540975587. The next prime is 540975679. The reversal of 540975643 is 346579045.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 540975643 - 2²¹ = 538878491 is a prime.

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 540975643.

It is not an unprimeable number, because it can be changed into a prime (540975943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20806743 + ... + 20806768.

It is an arithmetic number, because the mean of its divisors is an integer number (145647292).

Almost surely, 2^540975643 is an apocalyptic number.

540975643 is a deficient number, since it is larger than the sum of its proper divisors (41613525).

540975643 is a wasteful number, since it uses less digits than its factorization.

540975643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41613524.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 540975643 is about 23258.8830987217. The cubic root of 540975643 is about 814.8154163134.

The spelling of 540975643 in words is "five hundred forty million, nine hundred seventy-five thousand, six hundred forty-three".