180683149 has 4 divisors (see below), whose sum is σ = 180712764. Its totient is φ = 180653536.

The previous prime is 180683117. The next prime is 180683183. The reversal of 180683149 is 941386081.

180683149 is nontrivially palindromic in base 9.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43956900 + 136726249 = 6630^2 + 11693^2 .

It is a cyclic number.

It is not a de Polignac number, because 180683149 - 2⁵ = 180683117 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180683189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1912 + ... + 19105.

It is an arithmetic number, because the mean of its divisors is an integer number (45178191).

Almost surely, 2^180683149 is an apocalyptic number.

It is an amenable number.

180683149 is a deficient number, since it is larger than the sum of its proper divisors (29615).

180683149 is an equidigital number, since it uses as much as digits as its factorization.

180683149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29614.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 180683149 is about 13441.8432143810. The cubic root of 180683149 is about 565.3350131580.

The spelling of 180683149 in words is "one hundred eighty million, six hundred eighty-three thousand, one hundred forty-nine".