542509969 has 4 divisors (see below), whose sum is σ = 542815344. Its totient is φ = 542204596.

The previous prime is 542509963. The next prime is 542509987. The reversal of 542509969 is 969905245.

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 not a de Polignac number, because 542509969 - 2¹¹ = 542507921 is a prime.

It is a super-2 number, since 2×542509969² = 588634132928761922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542509963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150007 + ... + 153580.

It is an arithmetic number, because the mean of its divisors is an integer number (135703836).

Almost surely, 2^542509969 is an apocalyptic number.

It is an amenable number.

542509969 is a deficient number, since it is larger than the sum of its proper divisors (305375).

542509969 is a wasteful number, since it uses less digits than its factorization.

542509969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305374.

The product of its (nonzero) digits is 874800, while the sum is 49.

The square root of 542509969 is about 23291.8434006413. The cubic root of 542509969 is about 815.5850211395.

The spelling of 542509969 in words is "five hundred forty-two million, five hundred nine thousand, nine hundred sixty-nine".