542638003 has 4 divisors (see below), whose sum is σ = 543267648. Its totient is φ = 542008360.

The previous prime is 542637871. The next prime is 542638007. The reversal of 542638003 is 300836245.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 542638003 - 2²¹ = 540540851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542638007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313528 + ... + 315253.

It is an arithmetic number, because the mean of its divisors is an integer number (135816912).

Almost surely, 2^542638003 is an apocalyptic number.

542638003 is a deficient number, since it is larger than the sum of its proper divisors (629645).

542638003 is an equidigital number, since it uses as much as digits as its factorization.

542638003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629644.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 542638003 is about 23294.5917113823. The cubic root of 542638003 is about 815.6491762733.

The spelling of 542638003 in words is "five hundred forty-two million, six hundred thirty-eight thousand, three".