1168355997 has 12 divisors (see below), whose sum is σ = 1715292124. Its totient is φ = 766134720.

The previous prime is 1168355989. The next prime is 1168356017. The reversal of 1168355997 is 7995538611.

1168355997 is a `hidden beast` number, since 1 + 1 + 6 + 83 + 559 + 9 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 190605636 + 977750361 = 13806^2 + 31269^2 .

It is not a de Polignac number, because 1168355997 - 2³ = 1168355989 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 (1168355987) 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, 1063528 + ... + 1064625.

Almost surely, 2^1168355997 is an apocalyptic number.

It is an amenable number.

1168355997 is a deficient number, since it is larger than the sum of its proper divisors (546936127).

1168355997 is a wasteful number, since it uses less digits than its factorization.

1168355997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128220 (or 2128217 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 1168355997 is about 34181.2228716294. Note that the first 3 decimals coincide. The cubic root of 1168355997 is about 1053.2344696931.

The spelling of 1168355997 in words is "one billion, one hundred sixty-eight million, three hundred fifty-five thousand, nine hundred ninety-seven".