1163330261 has 2 divisors, whose sum is σ = 1163330262. Its totient is φ = 1163330260.

The previous prime is 1163330251. The next prime is 1163330297. The reversal of 1163330261 is 1620333611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1159743025 + 3587236 = 34055^2 + 1894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1163330261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1163330261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1163330251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581665130 + 581665131.

It is an arithmetic number, because the mean of its divisors is an integer number (581665131).

Almost surely, 2^1163330261 is an apocalyptic number.

It is an amenable number.

1163330261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163330261 is an equidigital number, since it uses as much as digits as its factorization.

1163330261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1163330261 is about 34107.6276073256. The cubic root of 1163330261 is about 1051.7221206166.

Adding to 1163330261 its reverse (1620333611), we get a palindrome (2783663872).

The spelling of 1163330261 in words is "one billion, one hundred sixty-three million, three hundred thirty thousand, two hundred sixty-one".