1129953818 has 20 divisors (see below), whose sum is σ = 1977309930. Its totient is φ = 484263864.

The previous prime is 1129953749. The next prime is 1129953823. The reversal of 1129953818 is 8183599211.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1087482529 + 42471289 = 32977^2 + 6517^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 112853 + ... + 122456.

Almost surely, 2^1129953818 is an apocalyptic number.

1129953818 is a deficient number, since it is larger than the sum of its proper divisors (847356112).

1129953818 is an frugal number, since it uses more digits than its factorization.

1129953818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235339 (or 235318 counting only the distinct ones).

The product of its digits is 155520, while the sum is 47.

The square root of 1129953818 is about 33614.7857051030. The cubic root of 1129953818 is about 1041.5662476537.

The spelling of 1129953818 in words is "one billion, one hundred twenty-nine million, nine hundred fifty-three thousand, eight hundred eighteen".