188742949 has 2 divisors, whose sum is σ = 188742950. Its totient is φ = 188742948.

The previous prime is 188742901. The next prime is 188743001. The reversal of 188742949 is 949247881.

It is a happy number.

It is an a-pointer prime, because the next prime (188743001) can be obtained adding 188742949 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186732225 + 2010724 = 13665^2 + 1418^2 .

It is a cyclic number.

It is not a de Polignac number, because 188742949 - 2⁷ = 188742821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 188742896 and 188742905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188743949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94371474 + 94371475.

It is an arithmetic number, because the mean of its divisors is an integer number (94371475).

Almost surely, 2^188742949 is an apocalyptic number.

It is an amenable number.

188742949 is a deficient number, since it is larger than the sum of its proper divisors (1).

188742949 is an equidigital number, since it uses as much as digits as its factorization.

188742949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 52.

The square root of 188742949 is about 13738.3750494736. The cubic root of 188742949 is about 573.6190670195.

The spelling of 188742949 in words is "one hundred eighty-eight million, seven hundred forty-two thousand, nine hundred forty-nine".