1216935229 has 2 divisors, whose sum is σ = 1216935230. Its totient is φ = 1216935228.

The previous prime is 1216935169. The next prime is 1216935241. The reversal of 1216935229 is 9225396121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 739731204 + 477204025 = 27198^2 + 21845^2 .

It is an emirp because it is prime and its reverse (9225396121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216935229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1216935191 and 1216935200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216935029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608467614 + 608467615.

It is an arithmetic number, because the mean of its divisors is an integer number (608467615).

Almost surely, 2^1216935229 is an apocalyptic number.

It is an amenable number.

1216935229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216935229 is an equidigital number, since it uses as much as digits as its factorization.

1216935229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 1216935229 is about 34884.5987364052. The cubic root of 1216935229 is about 1067.6342260564.

The spelling of 1216935229 in words is "one billion, two hundred sixteen million, nine hundred thirty-five thousand, two hundred twenty-nine".