1217116389 has 16 divisors (see below), whose sum is σ = 1678592000. Its totient is φ = 783632880.

The previous prime is 1217116331. The next prime is 1217116393. The reversal of 1217116389 is 9836117121.

It is not a de Polignac number, because 1217116389 - 2⁷ = 1217116261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217116189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33294 + ... + 59520.

It is an arithmetic number, because the mean of its divisors is an integer number (104912000).

Almost surely, 2^1217116389 is an apocalyptic number.

It is an amenable number.

1217116389 is a deficient number, since it is larger than the sum of its proper divisors (461475611).

1217116389 is a wasteful number, since it uses less digits than its factorization.

1217116389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26760.

The product of its digits is 18144, while the sum is 39.

The square root of 1217116389 is about 34887.1952011049. The cubic root of 1217116389 is about 1067.6872014914.

The spelling of 1217116389 in words is "one billion, two hundred seventeen million, one hundred sixteen thousand, three hundred eighty-nine".