543469909 has 4 divisors (see below), whose sum is σ = 543755916. Its totient is φ = 543183904.

The previous prime is 543469907. The next prime is 543469919. The reversal of 543469909 is 909964345.

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

It can be written as a sum of positive squares in 2 ways, for example, as 524547409 + 18922500 = 22903^2 + 4350^2 .

It is a cyclic number.

It is not a de Polignac number, because 543469909 - 2¹ = 543469907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543469907) 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, 140134 + ... + 143959.

It is an arithmetic number, because the mean of its divisors is an integer number (135938979).

Almost surely, 2^543469909 is an apocalyptic number.

It is an amenable number.

543469909 is a deficient number, since it is larger than the sum of its proper divisors (286007).

543469909 is a wasteful number, since it uses less digits than its factorization.

543469909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286006.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 543469909 is about 23312.4410776735. The cubic root of 543469909 is about 816.0657811933.

The spelling of 543469909 in words is "five hundred forty-three million, four hundred sixty-nine thousand, nine hundred nine".