1131534891 has 6 divisors (see below), whose sum is σ = 1634439300. Its totient is φ = 754356588.

The previous prime is 1131534883. The next prime is 1131534893. The reversal of 1131534891 is 1984351311.

It is a happy number.

1131534891 is a `hidden beast` number, since 1 + 1 + 31 + 534 + 8 + 91 = 666.

1131534891 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1131534891 - 2³ = 1131534883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131534893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62863041 + ... + 62863058.

It is an arithmetic number, because the mean of its divisors is an integer number (272406550).

Almost surely, 2^1131534891 is an apocalyptic number.

1131534891 is a deficient number, since it is larger than the sum of its proper divisors (502904409).

1131534891 is a wasteful number, since it uses less digits than its factorization.

1131534891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125726105 (or 125726102 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1131534891 is about 33638.2950073276. The cubic root of 1131534891 is about 1042.0518205323.

The spelling of 1131534891 in words is "one billion, one hundred thirty-one million, five hundred thirty-four thousand, eight hundred ninety-one".