540877509 has 6 divisors (see below), whose sum is σ = 781267526. Its totient is φ = 360585000.

The previous prime is 540877489. The next prime is 540877537. The reversal of 540877509 is 905778045.

It can be written as a sum of positive squares in only one way, i.e., 533748609 + 7128900 = 23103^2 + 2670^2 .

It is not a de Polignac number, because 540877509 - 2¹² = 540873413 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 (540877109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30048742 + ... + 30048759.

Almost surely, 2^540877509 is an apocalyptic number.

It is an amenable number.

540877509 is a deficient number, since it is larger than the sum of its proper divisors (240390017).

540877509 is a wasteful number, since it uses less digits than its factorization.

540877509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60097507 (or 60097504 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 540877509 is about 23256.7734004526. The cubic root of 540877509 is about 814.7661436505.

The spelling of 540877509 in words is "five hundred forty million, eight hundred seventy-seven thousand, five hundred nine".