540526309 has 4 divisors (see below), whose sum is σ = 540875916. Its totient is φ = 540176704.

The previous prime is 540526291. The next prime is 540526361. The reversal of 540526309 is 903625045.

540526309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 143640225 + 396886084 = 11985^2 + 19922^2 .

It is a cyclic number.

It is not a de Polignac number, because 540526309 - 2¹¹ = 540524261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540526409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172474 + ... + 175579.

It is an arithmetic number, because the mean of its divisors is an integer number (135218979).

Almost surely, 2^540526309 is an apocalyptic number.

It is an amenable number.

540526309 is a deficient number, since it is larger than the sum of its proper divisors (349607).

540526309 is a wasteful number, since it uses less digits than its factorization.

540526309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349606.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 540526309 is about 23249.2216858974. The cubic root of 540526309 is about 814.5897587819.

The spelling of 540526309 in words is "five hundred forty million, five hundred twenty-six thousand, three hundred nine".