1173987997 has 16 divisors (see below), whose sum is σ = 1445796352. Its totient is φ = 928298880.

The previous prime is 1173987967. The next prime is 1173988007. The reversal of 1173987997 is 7997893711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1173987997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173987967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205297 + ... + 210937.

It is an arithmetic number, because the mean of its divisors is an integer number (90362272).

Almost surely, 2^1173987997 is an apocalyptic number.

It is an amenable number.

1173987997 is a deficient number, since it is larger than the sum of its proper divisors (271808355).

1173987997 is a wasteful number, since it uses less digits than its factorization.

1173987997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7948.

The product of its digits is 6001128, while the sum is 61.

The square root of 1173987997 is about 34263.5082412762. The cubic root of 1173987997 is about 1054.9241118493.

The spelling of 1173987997 in words is "one billion, one hundred seventy-three million, nine hundred eighty-seven thousand, nine hundred ninety-seven".