1131109998 has 16 divisors (see below), whose sum is σ = 2278496640. Its totient is φ = 374323896.

The previous prime is 1131109963. The next prime is 1131110003. The reversal of 1131109998 is 8999011311.

It is a happy 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, 677290 + ... + 678957.

It is an arithmetic number, because the mean of its divisors is an integer number (142406040).

Almost surely, 2^1131109998 is an apocalyptic number.

1131109998 is an abundant number, since it is smaller than the sum of its proper divisors (1147386642).

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

1131109998 is a wasteful number, since it uses less digits than its factorization.

1131109998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356391.

The product of its (nonzero) digits is 17496, while the sum is 42.

The square root of 1131109998 is about 33631.9787999457. The cubic root of 1131109998 is about 1041.9213735444.

It can be divided in two parts, 113 and 1109998, that added together give a palindrome (1110111).

The spelling of 1131109998 in words is "one billion, one hundred thirty-one million, one hundred nine thousand, nine hundred ninety-eight".