1129769189 has 4 divisors (see below), whose sum is σ = 1133006700. Its totient is φ = 1126531680.

The previous prime is 1129769161. The next prime is 1129769213. The reversal of 1129769189 is 9819679211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 792422500 + 337346689 = 28150^2 + 18367^2 .

It is a cyclic number.

It is not a de Polignac number, because 1129769189 - 2⁸ = 1129768933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1129769189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129769129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1618232 + ... + 1618929.

It is an arithmetic number, because the mean of its divisors is an integer number (283251675).

Almost surely, 2^1129769189 is an apocalyptic number.

It is an amenable number.

1129769189 is a deficient number, since it is larger than the sum of its proper divisors (3237511).

1129769189 is an equidigital number, since it uses as much as digits as its factorization.

1129769189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237510.

The product of its digits is 489888, while the sum is 53.

The square root of 1129769189 is about 33612.0393460439. The cubic root of 1129769189 is about 1041.5095155978.

The spelling of 1129769189 in words is "one billion, one hundred twenty-nine million, seven hundred sixty-nine thousand, one hundred eighty-nine".