1116216997 has 12 divisors (see below), whose sum is σ = 1343281120. Its totient is φ = 906088896.

The previous prime is 1116216977. The next prime is 1116217019. The reversal of 1116216997 is 7996126111.

It is a happy number.

It is not a de Polignac number, because 1116216997 - 2⁷ = 1116216869 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116216917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 383853 + ... + 386749.

Almost surely, 2^1116216997 is an apocalyptic number.

It is an amenable number.

1116216997 is a deficient number, since it is larger than the sum of its proper divisors (227064123).

1116216997 is an frugal number, since it uses more digits than its factorization.

1116216997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5820 (or 2923 counting only the distinct ones).

The product of its digits is 40824, while the sum is 43.

The square root of 1116216997 is about 33409.8338367613. The cubic root of 1116216997 is about 1037.3282621239.

The spelling of 1116216997 in words is "one billion, one hundred sixteen million, two hundred sixteen thousand, nine hundred ninety-seven".