188326961 has 2 divisors, whose sum is σ = 188326962. Its totient is φ = 188326960.

The previous prime is 188326949. The next prime is 188326973. The reversal of 188326961 is 169623881.

It is a balanced prime because it is at equal distance from previous prime (188326949) and next prime (188326973).

It can be written as a sum of positive squares in only one way, i.e., 181063936 + 7263025 = 13456^2 + 2695^2 .

It is a cyclic number.

It is not a de Polignac number, because 188326961 - 2²² = 184132657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (188326991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94163480 + 94163481.

It is an arithmetic number, because the mean of its divisors is an integer number (94163481).

Almost surely, 2^188326961 is an apocalyptic number.

It is an amenable number.

188326961 is a deficient number, since it is larger than the sum of its proper divisors (1).

188326961 is an equidigital number, since it uses as much as digits as its factorization.

188326961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 188326961 is about 13723.2270621746. The cubic root of 188326961 is about 573.1973397104.

The spelling of 188326961 in words is "one hundred eighty-eight million, three hundred twenty-six thousand, nine hundred sixty-one".