1163143481 has 2 divisors, whose sum is σ = 1163143482. Its totient is φ = 1163143480.

The previous prime is 1163143447. The next prime is 1163143561. The reversal of 1163143481 is 1843413611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 605947456 + 557196025 = 24616^2 + 23605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1163143481 is a prime.

It is a super-2 number, since 2×1163143481² = 2705805514785594722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1163143981) 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 as a sum of consecutive naturals, namely, 581571740 + 581571741.

It is an arithmetic number, because the mean of its divisors is an integer number (581571741).

Almost surely, 2^1163143481 is an apocalyptic number.

It is an amenable number.

1163143481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163143481 is an equidigital number, since it uses as much as digits as its factorization.

1163143481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 1163143481 is about 34104.8894002018. The cubic root of 1163143481 is about 1051.6658307339.

The spelling of 1163143481 in words is "one billion, one hundred sixty-three million, one hundred forty-three thousand, four hundred eighty-one".