1166889869 has 2 divisors, whose sum is σ = 1166889870. Its totient is φ = 1166889868.

The previous prime is 1166889859. The next prime is 1166889917. The reversal of 1166889869 is 9689886611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 762477769 + 404412100 = 27613^2 + 20110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166889869 - 2⁴ = 1166889853 is a prime.

It is a super-2 number, since 2×1166889869² = 2723263932749674322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166889859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583444934 + 583444935.

It is an arithmetic number, because the mean of its divisors is an integer number (583444935).

Almost surely, 2^1166889869 is an apocalyptic number.

It is an amenable number.

1166889869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166889869 is an equidigital number, since it uses as much as digits as its factorization.

1166889869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8957952, while the sum is 62.

The square root of 1166889869 is about 34159.7697445401. The cubic root of 1166889869 is about 1052.7937299095.

The spelling of 1166889869 in words is "one billion, one hundred sixty-six million, eight hundred eighty-nine thousand, eight hundred sixty-nine".