113391018 has 24 divisors (see below), whose sum is σ = 264579588. Its totient is φ = 34889472.

The previous prime is 113391011. The next prime is 113391029. The reversal of 113391018 is 810193311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 112084569 + 1306449 = 10587^2 + 1143^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 113390982 and 113391000.

It is not an unprimeable number, because it can be changed into a prime (113391011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242055 + ... + 242522.

Almost surely, 2^113391018 is an apocalyptic number.

113391018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

113391018 is an abundant number, since it is smaller than the sum of its proper divisors (151188570).

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

113391018 is a wasteful number, since it uses less digits than its factorization.

113391018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484598 (or 484595 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 113391018 is about 10648.5218692549. The cubic root of 113391018 is about 484.0158140907.

The spelling of 113391018 in words is "one hundred thirteen million, three hundred ninety-one thousand, eighteen".