542811917 has 4 divisors (see below), whose sum is σ = 546455100. Its totient is φ = 539168736.

The previous prime is 542811911. The next prime is 542811943. The reversal of 542811917 is 719118245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 719118245 = 5 ⋅143823649.

It can be written as a sum of positive squares in 2 ways, for example, as 277089316 + 265722601 = 16646^2 + 16301^2 .

It is a cyclic number.

It is not a de Polignac number, because 542811917 - 2²⁴ = 526034701 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 (542811911) 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, 1821368 + ... + 1821665.

It is an arithmetic number, because the mean of its divisors is an integer number (136613775).

Almost surely, 2^542811917 is an apocalyptic number.

It is an amenable number.

542811917 is a deficient number, since it is larger than the sum of its proper divisors (3643183).

542811917 is a wasteful number, since it uses less digits than its factorization.

542811917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643182.

The product of its digits is 20160, while the sum is 38.

The square root of 542811917 is about 23298.3243388876. The cubic root of 542811917 is about 815.7363047447.

The spelling of 542811917 in words is "five hundred forty-two million, eight hundred eleven thousand, nine hundred seventeen".