1229982161 has 2 divisors, whose sum is σ = 1229982162. Its totient is φ = 1229982160.

The previous prime is 1229982121. The next prime is 1229982167. The reversal of 1229982161 is 1612899221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223950225 + 6031936 = 34985^2 + 2456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1229982161 is a prime.

It is a super-2 number, since 2×1229982161² = 3025712232756459842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1229982167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614991080 + 614991081.

It is an arithmetic number, because the mean of its divisors is an integer number (614991081).

Almost surely, 2^1229982161 is an apocalyptic number.

It is an amenable number.

1229982161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229982161 is an equidigital number, since it uses as much as digits as its factorization.

1229982161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 41.

The square root of 1229982161 is about 35071.1015082218. The cubic root of 1229982161 is about 1071.4360898715.

The spelling of 1229982161 in words is "one billion, two hundred twenty-nine million, nine hundred eighty-two thousand, one hundred sixty-one".