1217743983 has 24 divisors (see below), whose sum is σ = 1916441360. Its totient is φ = 764069760.

The previous prime is 1217743973. The next prime is 1217744023. The reversal of 1217743983 is 3893477121.

It is not a de Polignac number, because 1217743983 - 2²⁸ = 949308527 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 (1217743913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70228 + ... + 85833.

Almost surely, 2^1217743983 is an apocalyptic number.

1217743983 is a deficient number, since it is larger than the sum of its proper divisors (698697377).

1217743983 is a wasteful number, since it uses less digits than its factorization.

1217743983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156104 (or 156081 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 1217743983 is about 34896.1886600815. The cubic root of 1217743983 is about 1067.8706840650.

The spelling of 1217743983 in words is "one billion, two hundred seventeen million, seven hundred forty-three thousand, nine hundred eighty-three".