540185687 has 4 divisors (see below), whose sum is σ = 541634280. Its totient is φ = 538737096.

The previous prime is 540185629. The next prime is 540185707. The reversal of 540185687 is 786581045.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786581045 = 5 ⋅157316209.

It is a cyclic number.

It is not a de Polignac number, because 540185687 - 2¹² = 540181591 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 (540185287) 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, 723737 + ... + 724482.

It is an arithmetic number, because the mean of its divisors is an integer number (135408570).

Almost surely, 2^540185687 is an apocalyptic number.

540185687 is a deficient number, since it is larger than the sum of its proper divisors (1448593).

540185687 is a wasteful number, since it uses less digits than its factorization.

540185687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448592.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 540185687 is about 23241.8950819420. The cubic root of 540185687 is about 814.4186135529.

The spelling of 540185687 in words is "five hundred forty million, one hundred eighty-five thousand, six hundred eighty-seven".