163042809 has 16 divisors (see below), whose sum is σ = 219570624. Its totient is φ = 107611200.

The previous prime is 163042771. The next prime is 163042849. The reversal of 163042809 is 908240361.

It is not a de Polignac number, because 163042809 - 2¹⁶ = 162977273 is a prime.

It is a super-2 number, since 2×163042809² = 53165915133220962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163042809.

It is not an unprimeable number, because it can be changed into a prime (163042849) 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 15 ways as a sum of consecutive naturals, for example, 153139 + ... + 154199.

It is an arithmetic number, because the mean of its divisors is an integer number (13723164).

Almost surely, 2^163042809 is an apocalyptic number.

It is an amenable number.

163042809 is a deficient number, since it is larger than the sum of its proper divisors (56527815).

163042809 is a wasteful number, since it uses less digits than its factorization.

163042809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 163042809 is about 12768.8217545708. The cubic root of 163042809 is about 546.3033743209.

The spelling of 163042809 in words is "one hundred sixty-three million, forty-two thousand, eight hundred nine".