1171223129 has 2 divisors, whose sum is σ = 1171223130. Its totient is φ = 1171223128.

The previous prime is 1171223117. The next prime is 1171223147. The reversal of 1171223129 is 9213221711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714118729 + 457104400 = 26723^2 + 21380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1171223129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1171223149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585611564 + 585611565.

It is an arithmetic number, because the mean of its divisors is an integer number (585611565).

Almost surely, 2^1171223129 is an apocalyptic number.

It is an amenable number.

1171223129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171223129 is an equidigital number, since it uses as much as digits as its factorization.

1171223129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 1171223129 is about 34223.1373342655. The cubic root of 1171223129 is about 1054.0953076191.

The spelling of 1171223129 in words is "one billion, one hundred seventy-one million, two hundred twenty-three thousand, one hundred twenty-nine".