1216323677 has 8 divisors (see below), whose sum is σ = 1228802400. Its totient is φ = 1203865744.

The previous prime is 1216323673. The next prime is 1216323679. The reversal of 1216323677 is 7763236121.

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 1216323677 - 2² = 1216323673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1216323677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216323673) 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, 130199 + ... + 139227.

It is an arithmetic number, because the mean of its divisors is an integer number (153600300).

Almost surely, 2^1216323677 is an apocalyptic number.

It is an amenable number.

1216323677 is a deficient number, since it is larger than the sum of its proper divisors (12478723).

1216323677 is a wasteful number, since it uses less digits than its factorization.

1216323677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10395.

The product of its digits is 63504, while the sum is 38.

The square root of 1216323677 is about 34875.8322768074. The cubic root of 1216323677 is about 1067.4553550609.

Adding to 1216323677 its reverse (7763236121), we get a palindrome (8979559798).

The spelling of 1216323677 in words is "one billion, two hundred sixteen million, three hundred twenty-three thousand, six hundred seventy-seven".