180149899 has 4 divisors (see below), whose sum is σ = 180239040. Its totient is φ = 180060760.

The previous prime is 180149891. The next prime is 180149903. The reversal of 180149899 is 998941081.

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 180149899 - 2³ = 180149891 is a prime.

It is a super-2 number, since 2×180149899² = 64907972219420402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180149891) 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 3 ways as a sum of consecutive naturals, for example, 41467 + ... + 45604.

It is an arithmetic number, because the mean of its divisors is an integer number (45059760).

Almost surely, 2^180149899 is an apocalyptic number.

180149899 is a deficient number, since it is larger than the sum of its proper divisors (89141).

180149899 is an equidigital number, since it uses as much as digits as its factorization.

180149899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89140.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 180149899 is about 13421.9931083278. The cubic root of 180149899 is about 564.7783075739.

The spelling of 180149899 in words is "one hundred eighty million, one hundred forty-nine thousand, eight hundred ninety-nine".