1161968243 has 6 divisors (see below), whose sum is σ = 1181999964. Its totient is φ = 1142270444.

The previous prime is 1161968233. The next prime is 1161968251. The reversal of 1161968243 is 3428691611.

It is not a de Polignac number, because 1161968243 - 2²⁶ = 1094859379 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 1161968243.

It is not an unprimeable number, because it can be changed into a prime (1161968233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163421 + ... + 170382.

It is an arithmetic number, because the mean of its divisors is an integer number (196999994).

Almost surely, 2^1161968243 is an apocalyptic number.

1161968243 is a deficient number, since it is larger than the sum of its proper divisors (20031721).

1161968243 is an frugal number, since it uses more digits than its factorization.

1161968243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333921 (or 333862 counting only the distinct ones).

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

The square root of 1161968243 is about 34087.6552875084. The cubic root of 1161968243 is about 1051.3115109756.

The spelling of 1161968243 in words is "one billion, one hundred sixty-one million, nine hundred sixty-eight thousand, two hundred forty-three".