163724109 has 4 divisors (see below), whose sum is σ = 218298816. Its totient is φ = 109149404.

The previous prime is 163724089. The next prime is 163724117. The reversal of 163724109 is 901427361.

163724109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 163724109 - 2⁷ = 163723981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163724109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163724809) 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, 27287349 + ... + 27287354.

It is an arithmetic number, because the mean of its divisors is an integer number (54574704).

Almost surely, 2^163724109 is an apocalyptic number.

It is an amenable number.

163724109 is a deficient number, since it is larger than the sum of its proper divisors (54574707).

163724109 is an equidigital number, since it uses as much as digits as its factorization.

163724109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54574706.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 163724109 is about 12795.4722069957. The cubic root of 163724109 is about 547.0632550422.

The spelling of 163724109 in words is "one hundred sixty-three million, seven hundred twenty-four thousand, one hundred nine".