1191842798 has 4 divisors (see below), whose sum is σ = 1787764200. Its totient is φ = 595921398.

The previous prime is 1191842791. The next prime is 1191842801. The reversal of 1191842798 is 8972481911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8972481911 = 3011 ⋅2979901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191842791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 297960698 + ... + 297960701.

It is an arithmetic number, because the mean of its divisors is an integer number (446941050).

Almost surely, 2^1191842798 is an apocalyptic number.

1191842798 is a deficient number, since it is larger than the sum of its proper divisors (595921402).

1191842798 is an equidigital number, since it uses as much as digits as its factorization.

1191842798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595921401.

The product of its digits is 290304, while the sum is 50.

The square root of 1191842798 is about 34523.0763113602. The cubic root of 1191842798 is about 1060.2452256894.

The spelling of 1191842798 in words is "one billion, one hundred ninety-one million, eight hundred forty-two thousand, seven hundred ninety-eight".