161829199 has 4 divisors (see below), whose sum is σ = 184947664. Its totient is φ = 138710736.

The previous prime is 161829197. The next prime is 161829203. The reversal of 161829199 is 991928161.

161829199 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.

It is a cyclic number.

It is not a de Polignac number, because 161829199 - 2¹ = 161829197 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 (161829191) 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, 11559222 + ... + 11559235.

It is an arithmetic number, because the mean of its divisors is an integer number (46236916).

Almost surely, 2^161829199 is an apocalyptic number.

161829199 is a deficient number, since it is larger than the sum of its proper divisors (23118465).

161829199 is an equidigital number, since it uses as much as digits as its factorization.

161829199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23118464.

The product of its digits is 69984, while the sum is 46.

The square root of 161829199 is about 12721.2105949080. The cubic root of 161829199 is about 544.9445265200.

The spelling of 161829199 in words is "one hundred sixty-one million, eight hundred twenty-nine thousand, one hundred ninety-nine".