542437993 has 4 divisors (see below), whose sum is σ = 544205200. Its totient is φ = 540670788.

The previous prime is 542437979. The next prime is 542437997. The reversal of 542437993 is 399734245.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542437993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542437997) 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, 883143 + ... + 883756.

It is an arithmetic number, because the mean of its divisors is an integer number (136051300).

Almost surely, 2^542437993 is an apocalyptic number.

It is an amenable number.

542437993 is a deficient number, since it is larger than the sum of its proper divisors (1767207).

542437993 is a wasteful number, since it uses less digits than its factorization.

542437993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767206.

The product of its digits is 816480, while the sum is 46.

The square root of 542437993 is about 23290.2982591464. The cubic root of 542437993 is about 815.5489510535.

The spelling of 542437993 in words is "five hundred forty-two million, four hundred thirty-seven thousand, nine hundred ninety-three".