1135161991 has 2 divisors, whose sum is σ = 1135161992. Its totient is φ = 1135161990.

The previous prime is 1135161943. The next prime is 1135162027. The reversal of 1135161991 is 1991615311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1135161991 - 2²³ = 1126773383 is a prime.

It is a super-2 number, since 2×1135161991² = 2577185491622168162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1135161991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1135161491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567580995 + 567580996.

It is an arithmetic number, because the mean of its divisors is an integer number (567580996).

Almost surely, 2^1135161991 is an apocalyptic number.

1135161991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1135161991 is an equidigital number, since it uses as much as digits as its factorization.

1135161991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 37.

The square root of 1135161991 is about 33692.1651278157. The cubic root of 1135161991 is about 1043.1640545646.

The spelling of 1135161991 in words is "one billion, one hundred thirty-five million, one hundred sixty-one thousand, nine hundred ninety-one".