1216687363 has 8 divisors (see below), whose sum is σ = 1289322000. Its totient is φ = 1144912608.

The previous prime is 1216687343. The next prime is 1216687369. The reversal of 1216687363 is 3637866121.

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 1216687363 - 2¹⁷ = 1216556291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216687369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212056 + ... + 217717.

It is an arithmetic number, because the mean of its divisors is an integer number (161165250).

Almost surely, 2^1216687363 is an apocalyptic number.

1216687363 is a deficient number, since it is larger than the sum of its proper divisors (72634637).

1216687363 is a wasteful number, since it uses less digits than its factorization.

1216687363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429941.

The product of its digits is 217728, while the sum is 43.

The square root of 1216687363 is about 34881.0458988833. The cubic root of 1216687363 is about 1067.5617357031.

The spelling of 1216687363 in words is "one billion, two hundred sixteen million, six hundred eighty-seven thousand, three hundred sixty-three".