188720049 has 8 divisors (see below), whose sum is σ = 287573440. Its totient is φ = 107840016.

The previous prime is 188720047. The next prime is 188720071. The reversal of 188720049 is 940027881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 188720049 - 2¹ = 188720047 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 188719989 and 188720016.

It is not an unprimeable number, because it can be changed into a prime (188720047) 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 7 ways as a sum of consecutive naturals, for example, 4493314 + ... + 4493355.

It is an arithmetic number, because the mean of its divisors is an integer number (35946680).

Almost surely, 2^188720049 is an apocalyptic number.

It is an amenable number.

188720049 is a deficient number, since it is larger than the sum of its proper divisors (98853391).

188720049 is an equidigital number, since it uses as much as digits as its factorization.

188720049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8986679.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 188720049 is about 13737.5415922937. The cubic root of 188720049 is about 573.5958671985.

The spelling of 188720049 in words is "one hundred eighty-eight million, seven hundred twenty thousand, forty-nine".