540523891 has 8 divisors (see below), whose sum is σ = 573223824. Its totient is φ = 507924480.

The previous prime is 540523877. The next prime is 540523931. The reversal of 540523891 is 198325045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 540523891 - 2¹¹ = 540521843 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 540523891.

It is not an unprimeable number, because it can be changed into a prime (540523591) 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 7 ways as a sum of consecutive naturals, for example, 13905 + ... + 35698.

It is an arithmetic number, because the mean of its divisors is an integer number (71652978).

Almost surely, 2^540523891 is an apocalyptic number.

540523891 is a deficient number, since it is larger than the sum of its proper divisors (32699933).

540523891 is a wasteful number, since it uses less digits than its factorization.

540523891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50261.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 540523891 is about 23249.1696840984. The cubic root of 540523891 is about 814.5885441133.

The spelling of 540523891 in words is "five hundred forty million, five hundred twenty-three thousand, eight hundred ninety-one".