1163961543 has 4 divisors (see below), whose sum is σ = 1551948728. Its totient is φ = 775974360.

The previous prime is 1163961511. The next prime is 1163961553. The reversal of 1163961543 is 3451693611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3451693611 = 3 ⋅1150564537.

It is not a de Polignac number, because 1163961543 - 2⁵ = 1163961511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163961553) 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 3 ways as a sum of consecutive naturals, for example, 193993588 + ... + 193993593.

It is an arithmetic number, because the mean of its divisors is an integer number (387987182).

Almost surely, 2^1163961543 is an apocalyptic number.

1163961543 is a deficient number, since it is larger than the sum of its proper divisors (387987185).

1163961543 is an equidigital number, since it uses as much as digits as its factorization.

1163961543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387987184.

The product of its digits is 58320, while the sum is 39.

The square root of 1163961543 is about 34116.8806164925. The cubic root of 1163961543 is about 1051.9123254701.

The spelling of 1163961543 in words is "one billion, one hundred sixty-three million, nine hundred sixty-one thousand, five hundred forty-three".