1191696893 has 2 divisors, whose sum is σ = 1191696894. Its totient is φ = 1191696892.

The previous prime is 1191696859. The next prime is 1191696899. The reversal of 1191696893 is 3986961911.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 975812644 + 215884249 = 31238^2 + 14693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1191696893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1191696899) 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, 595848446 + 595848447.

It is an arithmetic number, because the mean of its divisors is an integer number (595848447).

Almost surely, 2^1191696893 is an apocalyptic number.

It is an amenable number.

1191696893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191696893 is an equidigital number, since it uses as much as digits as its factorization.

1191696893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 53.

The square root of 1191696893 is about 34520.9630949080. The cubic root of 1191696893 is about 1060.2019589675.

The spelling of 1191696893 in words is "one billion, one hundred ninety-one million, six hundred ninety-six thousand, eight hundred ninety-three".