163835243 has 16 divisors (see below), whose sum is σ = 196118496. Its totient is φ = 134883840.

The previous prime is 163835237. The next prime is 163835249. The reversal of 163835243 is 342538361.

It is an interprime number because it is at equal distance from previous prime (163835237) and next prime (163835249).

It is not a de Polignac number, because 163835243 - 2²⁰ = 162786667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163835249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3230 + ... + 18387.

It is an arithmetic number, because the mean of its divisors is an integer number (12257406).

Almost surely, 2^163835243 is an apocalyptic number.

163835243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

163835243 is a deficient number, since it is larger than the sum of its proper divisors (32283253).

163835243 is a wasteful number, since it uses less digits than its factorization.

163835243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21694.

The product of its digits is 51840, while the sum is 35.

The square root of 163835243 is about 12799.8141783387. The cubic root of 163835243 is about 547.1870070809.

The spelling of 163835243 in words is "one hundred sixty-three million, eight hundred thirty-five thousand, two hundred forty-three".