1216714999 has 2 divisors, whose sum is σ = 1216715000. Its totient is φ = 1216714998.

The previous prime is 1216714997. The next prime is 1216715029. The reversal of 1216714999 is 9994176121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1216714999 - 2¹ = 1216714997 is a prime.

Together with 1216714997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216714997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608357499 + 608357500.

It is an arithmetic number, because the mean of its divisors is an integer number (608357500).

Almost surely, 2^1216714999 is an apocalyptic number.

1216714999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216714999 is an equidigital number, since it uses as much as digits as its factorization.

1216714999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 49.

The square root of 1216714999 is about 34881.4420430119. The cubic root of 1216714999 is about 1067.5698185554.

The spelling of 1216714999 in words is "one billion, two hundred sixteen million, seven hundred fourteen thousand, nine hundred ninety-nine".