1189662143 has 12 divisors (see below), whose sum is σ = 1310170608. Its totient is φ = 1078038720.

The previous prime is 1189662049. The next prime is 1189662233. The reversal of 1189662143 is 3412669811.

It is not a de Polignac number, because 1189662143 - 2¹⁰ = 1189661119 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 1189662143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189662043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63338 + ... + 79943.

It is an arithmetic number, because the mean of its divisors is an integer number (109180884).

Almost surely, 2^1189662143 is an apocalyptic number.

1189662143 is a deficient number, since it is larger than the sum of its proper divisors (120508465).

1189662143 is a wasteful number, since it uses less digits than its factorization.

1189662143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143342 (or 143323 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 1189662143 is about 34491.4792811210. The cubic root of 1189662143 is about 1059.5982050814.

The spelling of 1189662143 in words is "one billion, one hundred eighty-nine million, six hundred sixty-two thousand, one hundred forty-three".