180000899 has 4 divisors (see below), whose sum is σ = 193847136. Its totient is φ = 166154664.

The previous prime is 180000869. The next prime is 180000901. The reversal of 180000899 is 998000081.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-180000899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180000839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6923099 + ... + 6923124.

It is an arithmetic number, because the mean of its divisors is an integer number (48461784).

Almost surely, 2^180000899 is an apocalyptic number.

180000899 is a deficient number, since it is larger than the sum of its proper divisors (13846237).

180000899 is a wasteful number, since it uses less digits than its factorization.

180000899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13846236.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 180000899 is about 13416.4413687088. The cubic root of 180000899 is about 564.6225573175.

The spelling of 180000899 in words is "one hundred eighty million, eight hundred ninety-nine", and thus it is an aban number.