542468639 has 8 divisors (see below), whose sum is σ = 595847040. Its totient is φ = 491573016.

The previous prime is 542468609. The next prime is 542468651. The reversal of 542468639 is 936864245.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 542468639 - 2⁸ = 542468383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542468593 and 542468602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542468609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620237 + ... + 621110.

It is an arithmetic number, because the mean of its divisors is an integer number (74480880).

Almost surely, 2^542468639 is an apocalyptic number.

542468639 is a deficient number, since it is larger than the sum of its proper divisors (53378401).

542468639 is a wasteful number, since it uses less digits than its factorization.

542468639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241389.

The product of its digits is 1244160, while the sum is 47.

The square root of 542468639 is about 23290.9561632836. The cubic root of 542468639 is about 815.5643093942.

The spelling of 542468639 in words is "five hundred forty-two million, four hundred sixty-eight thousand, six hundred thirty-nine".