1131368198 has 4 divisors (see below), whose sum is σ = 1697052300. Its totient is φ = 565684098.

The previous prime is 1131368191. The next prime is 1131368201. The reversal of 1131368198 is 8918631311.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131368191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282842048 + ... + 282842051.

It is an arithmetic number, because the mean of its divisors is an integer number (424263075).

Almost surely, 2^1131368198 is an apocalyptic number.

1131368198 is a deficient number, since it is larger than the sum of its proper divisors (565684102).

1131368198 is an equidigital number, since it uses as much as digits as its factorization.

1131368198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565684101.

The product of its digits is 31104, while the sum is 41.

The square root of 1131368198 is about 33635.8171894188. The cubic root of 1131368198 is about 1042.0006477770. Note that the first 3 decimals are identical.

The spelling of 1131368198 in words is "one billion, one hundred thirty-one million, three hundred sixty-eight thousand, one hundred ninety-eight".