1216878283 has 2 divisors, whose sum is σ = 1216878284. Its totient is φ = 1216878282.

The previous prime is 1216878281. The next prime is 1216878329. The reversal of 1216878283 is 3828786121.

It is an a-pointer prime, because the next prime (1216878329) can be obtained adding 1216878283 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1216878283 - 2¹ = 1216878281 is a prime.

Together with 1216878281, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1216878281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608439141 + 608439142.

It is an arithmetic number, because the mean of its divisors is an integer number (608439142).

Almost surely, 2^1216878283 is an apocalyptic number.

1216878283 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216878283 is an equidigital number, since it uses as much as digits as its factorization.

1216878283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 46.

The square root of 1216878283 is about 34883.7825213952. The cubic root of 1216878283 is about 1067.6175726236.

The spelling of 1216878283 in words is "one billion, two hundred sixteen million, eight hundred seventy-eight thousand, two hundred eighty-three".