188321149 has 2 divisors, whose sum is σ = 188321150. Its totient is φ = 188321148.

The previous prime is 188321131. The next prime is 188321191. The reversal of 188321149 is 941123881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155625625 + 32695524 = 12475^2 + 5718^2 .

It is a cyclic number.

It is not a de Polignac number, because 188321149 - 2⁵ = 188321117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188321449) 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 as a sum of consecutive naturals, namely, 94160574 + 94160575.

It is an arithmetic number, because the mean of its divisors is an integer number (94160575).

Almost surely, 2^188321149 is an apocalyptic number.

It is an amenable number.

188321149 is a deficient number, since it is larger than the sum of its proper divisors (1).

188321149 is an equidigital number, since it uses as much as digits as its factorization.

188321149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 188321149 is about 13723.0153027678. The cubic root of 188321149 is about 573.1914431265.

It can be divided in two parts, 1883 and 21149, that added together give a palindrome (23032).

The spelling of 188321149 in words is "one hundred eighty-eight million, three hundred twenty-one thousand, one hundred forty-nine".