113885781 has 8 divisors (see below), whose sum is σ = 151907424. Its totient is φ = 75894000.

The previous prime is 113885777. The next prime is 113885797. The reversal of 113885781 is 187588311.

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

It is not a de Polignac number, because 113885781 - 2² = 113885777 is a prime.

It is a super-2 number, since 2×113885781² = 25939942227959922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113885731) 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 7 ways as a sum of consecutive naturals, for example, 3915 + ... + 15591.

It is an arithmetic number, because the mean of its divisors is an integer number (18988428).

Almost surely, 2^113885781 is an apocalyptic number.

It is an amenable number.

113885781 is a deficient number, since it is larger than the sum of its proper divisors (38021643).

113885781 is a wasteful number, since it uses less digits than its factorization.

113885781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14931.

The product of its digits is 53760, while the sum is 42.

The square root of 113885781 is about 10671.7281168516. The cubic root of 113885781 is about 484.7187670577.

The spelling of 113885781 in words is "one hundred thirteen million, eight hundred eighty-five thousand, seven hundred eighty-one".