1161613331 has 2 divisors, whose sum is σ = 1161613332. Its totient is φ = 1161613330.

The previous prime is 1161613289. The next prime is 1161613337. The reversal of 1161613331 is 1333161611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161613331 - 2⁶ = 1161613267 is a prime.

It is a super-2 number, since 2×1161613331² = 2698691061513831122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1161613331.

It is not a weakly prime, because it can be changed into another prime (1161613337) 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, 580806665 + 580806666.

It is an arithmetic number, because the mean of its divisors is an integer number (580806666).

Almost surely, 2^1161613331 is an apocalyptic number.

1161613331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161613331 is an equidigital number, since it uses as much as digits as its factorization.

1161613331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 1161613331 is about 34082.4490170528. The cubic root of 1161613331 is about 1051.2044624200.

Adding to 1161613331 its reverse (1333161611), we get a palindrome (2494774942).

The spelling of 1161613331 in words is "one billion, one hundred sixty-one million, six hundred thirteen thousand, three hundred thirty-one".