1161317198 has 4 divisors (see below), whose sum is σ = 1741975800. Its totient is φ = 580658598.

The previous prime is 1161317191. The next prime is 1161317233. The reversal of 1161317198 is 8917131611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8917131611 = 457 ⋅19512323.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161317191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290329298 + ... + 290329301.

It is an arithmetic number, because the mean of its divisors is an integer number (435493950).

Almost surely, 2^1161317198 is an apocalyptic number.

1161317198 is a deficient number, since it is larger than the sum of its proper divisors (580658602).

1161317198 is an equidigital number, since it uses as much as digits as its factorization.

1161317198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580658601.

The product of its digits is 9072, while the sum is 38.

The square root of 1161317198 is about 34078.1043780314. The cubic root of 1161317198 is about 1051.1151260979.

The spelling of 1161317198 in words is "one billion, one hundred sixty-one million, three hundred seventeen thousand, one hundred ninety-eight".