1171091198 has 16 divisors (see below), whose sum is σ = 1799717184. Its totient is φ = 571264800.

The previous prime is 1171091147. The next prime is 1171091203. The reversal of 1171091198 is 8911901711.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10148 + ... + 49448.

It is an arithmetic number, because the mean of its divisors is an integer number (112482324).

Almost surely, 2^1171091198 is an apocalyptic number.

1171091198 is a deficient number, since it is larger than the sum of its proper divisors (628625986).

1171091198 is a wasteful number, since it uses less digits than its factorization.

1171091198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39667.

The product of its (nonzero) digits is 4536, while the sum is 38.

The square root of 1171091198 is about 34221.2097682125. The cubic root of 1171091198 is about 1054.0557270397.

The spelling of 1171091198 in words is "one billion, one hundred seventy-one million, ninety-one thousand, one hundred ninety-eight".