1129957727 has 4 divisors (see below), whose sum is σ = 1136270520. Its totient is φ = 1123644936.

The previous prime is 1129957709. The next prime is 1129957757. The reversal of 1129957727 is 7277599211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1129957727 - 2¹⁰ = 1129956703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129957757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3156128 + ... + 3156485.

It is an arithmetic number, because the mean of its divisors is an integer number (284067630).

Almost surely, 2^1129957727 is an apocalyptic number.

1129957727 is a deficient number, since it is larger than the sum of its proper divisors (6312793).

1129957727 is an equidigital number, since it uses as much as digits as its factorization.

1129957727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6312792.

The product of its digits is 555660, while the sum is 50.

The square root of 1129957727 is about 33614.8438491093. The cubic root of 1129957727 is about 1041.5674487287.

The spelling of 1129957727 in words is "one billion, one hundred twenty-nine million, nine hundred fifty-seven thousand, seven hundred twenty-seven".