1191492798 has 8 divisors (see below), whose sum is σ = 2382985608. Its totient is φ = 397164264.

The previous prime is 1191492779. The next prime is 1191492803. The reversal of 1191492798 is 8972941911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1191492798 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1191492798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99291061 + ... + 99291072.

It is an arithmetic number, because the mean of its divisors is an integer number (297873201).

Almost surely, 2^1191492798 is an apocalyptic number.

1191492798 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1191492798 is a wasteful number, since it uses less digits than its factorization.

1191492798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198582138.

The product of its digits is 326592, while the sum is 51.

The square root of 1191492798 is about 34518.0068659823. The cubic root of 1191492798 is about 1060.1414306363.

The spelling of 1191492798 in words is "one billion, one hundred ninety-one million, four hundred ninety-two thousand, seven hundred ninety-eight".