1113733991 has 4 divisors (see below), whose sum is σ = 1162157232. Its totient is φ = 1065310752.

The previous prime is 1113733981. The next prime is 1113734051. The reversal of 1113733991 is 1993373111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1993373111 = 103 ⋅19353137.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113733991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113733981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24211586 + ... + 24211631.

It is an arithmetic number, because the mean of its divisors is an integer number (290539308).

Almost surely, 2^1113733991 is an apocalyptic number.

1113733991 is a deficient number, since it is larger than the sum of its proper divisors (48423241).

1113733991 is an equidigital number, since it uses as much as digits as its factorization.

1113733991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48423240.

The product of its digits is 15309, while the sum is 38.

The square root of 1113733991 is about 33372.6533407220. The cubic root of 1113733991 is about 1036.5585179699.

The spelling of 1113733991 in words is "one billion, one hundred thirteen million, seven hundred thirty-three thousand, nine hundred ninety-one".