180199849 has 2 divisors, whose sum is σ = 180199850. Its totient is φ = 180199848.

The previous prime is 180199787. The next prime is 180199853. The reversal of 180199849 is 948991081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155875225 + 24324624 = 12485^2 + 4932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180199849 is a prime.

It is not a weakly prime, because it can be changed into another prime (180191849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90099924 + 90099925.

It is an arithmetic number, because the mean of its divisors is an integer number (90099925).

Almost surely, 2^180199849 is an apocalyptic number.

It is an amenable number.

180199849 is a deficient number, since it is larger than the sum of its proper divisors (1).

180199849 is an equidigital number, since it uses as much as digits as its factorization.

180199849 is an odious number, because the sum of its binary digits is odd.

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

The square root of 180199849 is about 13423.8537313247. The cubic root of 180199849 is about 564.8305012743.

The spelling of 180199849 in words is "one hundred eighty million, one hundred ninety-nine thousand, eight hundred forty-nine".