1217942168 has 16 divisors (see below), whose sum is σ = 2293705080. Its totient is φ = 606287488.

The previous prime is 1217942153. The next prime is 1217942171. The reversal of 1217942168 is 8612497121.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 333521 + ... + 337152.

Almost surely, 2^1217942168 is an apocalyptic number.

It is an amenable number.

1217942168 is a deficient number, since it is larger than the sum of its proper divisors (1075762912).

1217942168 is a wasteful number, since it uses less digits than its factorization.

1217942168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670906 (or 670902 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 1217942168 is about 34899.0281813119. The cubic root of 1217942168 is about 1067.9286120790.

The spelling of 1217942168 in words is "one billion, two hundred seventeen million, nine hundred forty-two thousand, one hundred sixty-eight".