1158689231 has 12 divisors (see below), whose sum is σ = 1359797472. Its totient is φ = 984368448.

The previous prime is 1158689227. The next prime is 1158689237. The reversal of 1158689231 is 1329868511.

It is not a de Polignac number, because 1158689231 - 2² = 1158689227 is a prime.

It is a super-2 number, since 2×1158689231² = 2685121468070742722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158689237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99095 + ... + 110168.

It is an arithmetic number, because the mean of its divisors is an integer number (113316456).

Almost surely, 2^1158689231 is an apocalyptic number.

1158689231 is a deficient number, since it is larger than the sum of its proper divisors (201108241).

1158689231 is a wasteful number, since it uses less digits than its factorization.

1158689231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209390 (or 209383 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 1158689231 is about 34039.5245413328. The cubic root of 1158689231 is about 1050.3216644120.

The spelling of 1158689231 in words is "one billion, one hundred fifty-eight million, six hundred eighty-nine thousand, two hundred thirty-one".