188041393 has 2 divisors, whose sum is σ = 188041394. Its totient is φ = 188041392.

The previous prime is 188041361. The next prime is 188041411. The reversal of 188041393 is 393140881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172580769 + 15460624 = 13137^2 + 3932^2 .

It is a cyclic number.

It is not a de Polignac number, because 188041393 - 2⁵ = 188041361 is a prime.

It is not a weakly prime, because it can be changed into another prime (188041303) 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, 94020696 + 94020697.

It is an arithmetic number, because the mean of its divisors is an integer number (94020697).

Almost surely, 2^188041393 is an apocalyptic number.

It is an amenable number.

188041393 is a deficient number, since it is larger than the sum of its proper divisors (1).

188041393 is an equidigital number, since it uses as much as digits as its factorization.

188041393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 188041393 is about 13712.8185651237. The cubic root of 188041393 is about 572.9074721633.

The spelling of 188041393 in words is "one hundred eighty-eight million, forty-one thousand, three hundred ninety-three".