1216933513 has 2 divisors, whose sum is σ = 1216933514. Its totient is φ = 1216933512.

The previous prime is 1216933493. The next prime is 1216933561. The reversal of 1216933513 is 3153396121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1214383104 + 2550409 = 34848^2 + 1597^2 .

It is an emirp because it is prime and its reverse (3153396121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1216933513 - 2⁹ = 1216933001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216934513) 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, 608466756 + 608466757.

It is an arithmetic number, because the mean of its divisors is an integer number (608466757).

Almost surely, 2^1216933513 is an apocalyptic number.

It is an amenable number.

1216933513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216933513 is an equidigital number, since it uses as much as digits as its factorization.

1216933513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 34.

The square root of 1216933513 is about 34884.5741410154. The cubic root of 1216933513 is about 1067.6337242326.

The spelling of 1216933513 in words is "one billion, two hundred sixteen million, nine hundred thirty-three thousand, five hundred thirteen".