1171211982 has 16 divisors (see below), whose sum is σ = 2346760272. Its totient is φ = 389681280.

The previous prime is 1171211947. The next prime is 1171211999. The reversal of 1171211982 is 2891121711.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 177163 + ... + 183654.

It is an arithmetic number, because the mean of its divisors is an integer number (146672517).

Almost surely, 2^1171211982 is an apocalyptic number.

1171211982 is an abundant number, since it is smaller than the sum of its proper divisors (1175548290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1171211982 is a wasteful number, since it uses less digits than its factorization.

1171211982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361363.

The product of its digits is 2016, while the sum is 33.

The square root of 1171211982 is about 34222.9744762199. The cubic root of 1171211982 is about 1054.0919635260.

The spelling of 1171211982 in words is "one billion, one hundred seventy-one million, two hundred eleven thousand, nine hundred eighty-two".