1311181149 has 16 divisors (see below), whose sum is σ = 1765540800. Its totient is φ = 865487616.

The previous prime is 1311181139. The next prime is 1311181159. The reversal of 1311181149 is 9411811131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1311181139) and next prime (1311181159).

It is not a de Polignac number, because 1311181149 - 2⁷ = 1311181021 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311181139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547647 + ... + 550035.

It is an arithmetic number, because the mean of its divisors is an integer number (110346300).

Almost surely, 2^1311181149 is an apocalyptic number.

It is an amenable number.

1311181149 is a deficient number, since it is larger than the sum of its proper divisors (454359651).

1311181149 is a wasteful number, since it uses less digits than its factorization.

1311181149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4124.

The product of its digits is 864, while the sum is 30.

The square root of 1311181149 is about 36210.2354176274. The cubic root of 1311181149 is about 1094.5129361526.

The spelling of 1311181149 in words is "one billion, three hundred eleven million, one hundred eighty-one thousand, one hundred forty-nine".