1229132813 has 2 divisors, whose sum is σ = 1229132814. Its totient is φ = 1229132812.

The previous prime is 1229132791. The next prime is 1229132831. The reversal of 1229132813 is 3182319221.

Together with next prime (1229132831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227661444 + 1471369 = 35038^2 + 1213^2 .

It is a cyclic number.

It is not a de Polignac number, because 1229132813 - 2¹⁰ = 1229131789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1229132813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229132843) 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, 614566406 + 614566407.

It is an arithmetic number, because the mean of its divisors is an integer number (614566407).

Almost surely, 2^1229132813 is an apocalyptic number.

It is an amenable number.

1229132813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229132813 is an equidigital number, since it uses as much as digits as its factorization.

1229132813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 1229132813 is about 35058.9904732010. The cubic root of 1229132813 is about 1071.1894110504.

The spelling of 1229132813 in words is "one billion, two hundred twenty-nine million, one hundred thirty-two thousand, eight hundred thirteen".