1320600191 has 2 divisors, whose sum is σ = 1320600192. Its totient is φ = 1320600190.

The previous prime is 1320600143. The next prime is 1320600227. The reversal of 1320600191 is 1910060231.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320600191 - 2¹⁰ = 1320599167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320600121) 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, 660300095 + 660300096.

It is an arithmetic number, because the mean of its divisors is an integer number (660300096).

Almost surely, 2^1320600191 is an apocalyptic number.

1320600191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320600191 is an equidigital number, since it uses as much as digits as its factorization.

1320600191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1320600191 is about 36340.0631672539. The cubic root of 1320600191 is about 1097.1275444622.

The spelling of 1320600191 in words is "one billion, three hundred twenty million, six hundred thousand, one hundred ninety-one".