188381849 has 2 divisors, whose sum is σ = 188381850. Its totient is φ = 188381848.

The previous prime is 188381821. The next prime is 188381881. The reversal of 188381849 is 948183881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187498249 + 883600 = 13693^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 188381849 - 2¹² = 188377753 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 188381797 and 188381806.

It is not a weakly prime, because it can be changed into another prime (188381819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94190924 + 94190925.

It is an arithmetic number, because the mean of its divisors is an integer number (94190925).

Almost surely, 2^188381849 is an apocalyptic number.

It is an amenable number.

188381849 is a deficient number, since it is larger than the sum of its proper divisors (1).

188381849 is an equidigital number, since it uses as much as digits as its factorization.

188381849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 442368, while the sum is 50.

The square root of 188381849 is about 13725.2267376536. The cubic root of 188381849 is about 573.2530205317.

The spelling of 188381849 in words is "one hundred eighty-eight million, three hundred eighty-one thousand, eight hundred forty-nine".