9781113669 has 8 divisors (see below), whose sum is σ = 13198611552. Its totient is φ = 6442179120.

The previous prime is 9781113623. The next prime is 9781113673. The reversal of 9781113669 is 9663111879.

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

It is not a de Polignac number, because 9781113669 - 2⁹ = 9781113157 is a prime.

It is a super-2 number, since 2×9781113669² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9781113619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19640542 + ... + 19641039.

It is an arithmetic number, because the mean of its divisors is an integer number (1649826444).

Almost surely, 2^9781113669 is an apocalyptic number.

It is an amenable number.

9781113669 is a deficient number, since it is larger than the sum of its proper divisors (3417497883).

9781113669 is a wasteful number, since it uses less digits than its factorization.

9781113669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39281667.

The product of its digits is 489888, while the sum is 51.

The square root of 9781113669 is about 98899.5129866674. The cubic root of 9781113669 is about 2138.5993738383.

The spelling of 9781113669 in words is "nine billion, seven hundred eighty-one million, one hundred thirteen thousand, six hundred sixty-nine".