1128134691 has 12 divisors (see below), whose sum is σ = 1652479920. Its totient is φ = 741496560.

The previous prime is 1128134681. The next prime is 1128134701. The reversal of 1128134691 is 1964318211.

1128134691 is a `hidden beast` number, since 112 + 81 + 3 + 469 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1128134681) and next prime (1128134701).

It is not a de Polignac number, because 1128134691 - 2¹³ = 1128126499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1128134681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 882096 + ... + 883373.

It is an arithmetic number, because the mean of its divisors is an integer number (137706660).

Almost surely, 2^1128134691 is an apocalyptic number.

1128134691 is a deficient number, since it is larger than the sum of its proper divisors (524345229).

1128134691 is a wasteful number, since it uses less digits than its factorization.

1128134691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765546 (or 1765543 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1128134691 is about 33587.7163707210. The cubic root of 1128134691 is about 1041.0070038590.

The spelling of 1128134691 in words is "one billion, one hundred twenty-eight million, one hundred thirty-four thousand, six hundred ninety-one".