1166193869 has 2 divisors, whose sum is σ = 1166193870. Its totient is φ = 1166193868.

The previous prime is 1166193859. The next prime is 1166193877. The reversal of 1166193869 is 9683916611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593166025 + 573027844 = 24355^2 + 23938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166193869 is a prime.

It is a super-2 number, since 2×1166193869² = 2720016280186378322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166193859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583096934 + 583096935.

It is an arithmetic number, because the mean of its divisors is an integer number (583096935).

Almost surely, 2^1166193869 is an apocalyptic number.

It is an amenable number.

1166193869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166193869 is an equidigital number, since it uses as much as digits as its factorization.

1166193869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 50.

The square root of 1166193869 is about 34149.5808026980. The cubic root of 1166193869 is about 1052.5843727721.

The spelling of 1166193869 in words is "one billion, one hundred sixty-six million, one hundred ninety-three thousand, eight hundred sixty-nine".