1216016917 has 2 divisors, whose sum is σ = 1216016918. Its totient is φ = 1216016916.

The previous prime is 1216016911. The next prime is 1216016941. The reversal of 1216016917 is 7196106121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215986641 + 30276 = 34871^2 + 174^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216016917 - 2²⁷ = 1081799189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216016911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608008458 + 608008459.

It is an arithmetic number, because the mean of its divisors is an integer number (608008459).

Almost surely, 2^1216016917 is an apocalyptic number.

It is an amenable number.

1216016917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216016917 is an equidigital number, since it uses as much as digits as its factorization.

1216016917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1216016917 is about 34871.4341116049. The cubic root of 1216016917 is about 1067.3656091753.

The spelling of 1216016917 in words is "one billion, two hundred sixteen million, sixteen thousand, nine hundred seventeen".