1216963317 has 8 divisors (see below), whose sum is σ = 1627737696. Its totient is φ = 808748912.

The previous prime is 1216963291. The next prime is 1216963367. The reversal of 1216963317 is 7133696121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1216963317 - 2⁸ = 1216963061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216963367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638883 + ... + 640784.

It is an arithmetic number, because the mean of its divisors is an integer number (203467212).

Almost surely, 2^1216963317 is an apocalyptic number.

It is an amenable number.

1216963317 is a deficient number, since it is larger than the sum of its proper divisors (410774379).

1216963317 is a wasteful number, since it uses less digits than its factorization.

1216963317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279987.

The product of its digits is 40824, while the sum is 39.

The square root of 1216963317 is about 34885.0013186183. The cubic root of 1216963317 is about 1067.6424399910.

The spelling of 1216963317 in words is "one billion, two hundred sixteen million, nine hundred sixty-three thousand, three hundred seventeen".