107663681 has 4 divisors (see below), whose sum is σ = 107758212. Its totient is φ = 107569152.

The previous prime is 107663659. The next prime is 107663683. The reversal of 107663681 is 186366701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186366701 = 617 ⋅302053.

It can be written as a sum of positive squares in 2 ways, for example, as 95726656 + 11937025 = 9784^2 + 3455^2 .

It is a cyclic number.

It is not a de Polignac number, because 107663681 - 2¹⁰ = 107662657 is a prime.

It is a super-2 number, since 2×107663681² = 23182936412939522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (107663683) 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, 45536 + ... + 47841.

It is an arithmetic number, because the mean of its divisors is an integer number (26939553).

Almost surely, 2^107663681 is an apocalyptic number.

It is an amenable number.

107663681 is a deficient number, since it is larger than the sum of its proper divisors (94531).

107663681 is an equidigital number, since it uses as much as digits as its factorization.

107663681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94530.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 107663681 is about 10376.1110730369. Note that the first 3 decimals coincide. The cubic root of 107663681 is about 475.7254746025.

The spelling of 107663681 in words is "one hundred seven million, six hundred sixty-three thousand, six hundred eighty-one".