1163312043 has 4 divisors (see below), whose sum is σ = 1551082728. Its totient is φ = 775541360.

The previous prime is 1163311949. The next prime is 1163312047. The reversal of 1163312043 is 3402133611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3402133611 = 3 ⋅1134044537.

It is a cyclic number.

It is not a de Polignac number, because 1163312043 - 2¹² = 1163307947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1163312047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193885338 + ... + 193885343.

It is an arithmetic number, because the mean of its divisors is an integer number (387770682).

Almost surely, 2^1163312043 is an apocalyptic number.

1163312043 is a deficient number, since it is larger than the sum of its proper divisors (387770685).

1163312043 is an equidigital number, since it uses as much as digits as its factorization.

1163312043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387770684.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1163312043 is about 34107.3605399187. The cubic root of 1163312043 is about 1051.7166305237.

Adding to 1163312043 its reverse (3402133611), we get a palindrome (4565445654).

The spelling of 1163312043 in words is "one billion, one hundred sixty-three million, three hundred twelve thousand, forty-three".