1131830869 has 4 divisors (see below), whose sum is σ = 1218894796. Its totient is φ = 1044766944.

The previous prime is 1131830857. The next prime is 1131830927. The reversal of 1131830869 is 9680381311.

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 111028369 + 1020802500 = 10537^2 + 31950^2 .

It is not a de Polignac number, because 1131830869 - 2⁵ = 1131830837 is a prime.

It is a super-3 number, since 3×1131830869³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131830839) 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, 43531944 + ... + 43531969.

It is an arithmetic number, because the mean of its divisors is an integer number (304723699).

Almost surely, 2^1131830869 is an apocalyptic number.

It is an amenable number.

1131830869 is a deficient number, since it is larger than the sum of its proper divisors (87063927).

1131830869 is an equidigital number, since it uses as much as digits as its factorization.

1131830869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87063926.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1131830869 is about 33642.6941400358. The cubic root of 1131830869 is about 1042.1426698522.

The spelling of 1131830869 in words is "one billion, one hundred thirty-one million, eight hundred thirty thousand, eight hundred sixty-nine".