542987819 has 4 divisors (see below), whose sum is σ = 592350360. Its totient is φ = 493625280.

The previous prime is 542987813. The next prime is 542987827. The reversal of 542987819 is 918789245.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542987819 is a prime.

It is a super-2 number, since 2×542987819² = 589671543164753522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542987813) 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, 24681254 + ... + 24681275.

It is an arithmetic number, because the mean of its divisors is an integer number (148087590).

Almost surely, 2^542987819 is an apocalyptic number.

542987819 is a deficient number, since it is larger than the sum of its proper divisors (49362541).

542987819 is a wasteful number, since it uses less digits than its factorization.

542987819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49362540.

The product of its digits is 1451520, while the sum is 53.

The square root of 542987819 is about 23302.0990256243. The cubic root of 542987819 is about 815.8244102475.

The spelling of 542987819 in words is "five hundred forty-two million, nine hundred eighty-seven thousand, eight hundred nineteen".