1129591023 has 12 divisors (see below), whose sum is σ = 1655489304. Its totient is φ = 684600400.

The previous prime is 1129591007. The next prime is 1129591031. The reversal of 1129591023 is 3201959211.

It is not a de Polignac number, because 1129591023 - 2⁴ = 1129591007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129591003) 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, 1555548 + ... + 1556273.

It is an arithmetic number, because the mean of its divisors is an integer number (137957442).

Almost surely, 2^1129591023 is an apocalyptic number.

1129591023 is a deficient number, since it is larger than the sum of its proper divisors (525898281).

1129591023 is a wasteful number, since it uses less digits than its factorization.

1129591023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111846 (or 3111835 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 1129591023 is about 33609.3889114337. The cubic root of 1129591023 is about 1041.4547636062.

The spelling of 1129591023 in words is "one billion, one hundred twenty-nine million, five hundred ninety-one thousand, twenty-three".