540238999 has 4 divisors (see below), whose sum is σ = 558867960. Its totient is φ = 521610040.

The previous prime is 540238957. The next prime is 540239003. The reversal of 540238999 is 999832045.

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 540238999 - 2¹³ = 540230807 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540238499) 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, 9314437 + ... + 9314494.

It is an arithmetic number, because the mean of its divisors is an integer number (139716990).

Almost surely, 2^540238999 is an apocalyptic number.

540238999 is a deficient number, since it is larger than the sum of its proper divisors (18628961).

540238999 is a wasteful number, since it uses less digits than its factorization.

540238999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18628960.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 540238999 is about 23243.0419480756. The cubic root of 540238999 is about 814.4454048693.

The spelling of 540238999 in words is "five hundred forty million, two hundred thirty-eight thousand, nine hundred ninety-nine".