1179985511 has 2 divisors, whose sum is σ = 1179985512. Its totient is φ = 1179985510.

The previous prime is 1179985501. The next prime is 1179985523. The reversal of 1179985511 is 1155899711.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1155899711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1179985511 - 2²⁶ = 1112876647 is a prime.

It is a super-2 number, since 2×1179985511² = 2784731612339862242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1179985501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589992755 + 589992756.

It is an arithmetic number, because the mean of its divisors is an integer number (589992756).

Almost surely, 2^1179985511 is an apocalyptic number.

1179985511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1179985511 is an equidigital number, since it uses as much as digits as its factorization.

1179985511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 47.

The square root of 1179985511 is about 34350.9171784394. The cubic root of 1179985511 is about 1056.7174801443.

The spelling of 1179985511 in words is "one billion, one hundred seventy-nine million, nine hundred eighty-five thousand, five hundred eleven".