107196781 has 4 divisors (see below), whose sum is σ = 113502492. Its totient is φ = 100891072.

The previous prime is 107196779. The next prime is 107196809. The reversal of 107196781 is 187691701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187691701 = 31 ⋅6054571.

It can be written as a sum of positive squares in 2 ways, for example, as 40513225 + 66683556 = 6365^2 + 8166^2 .

It is a cyclic number.

It is not a de Polignac number, because 107196781 - 2¹ = 107196779 is a prime.

It is a super-2 number, since 2×107196781² = 22982299713523922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107196701) 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, 3152830 + ... + 3152863.

It is an arithmetic number, because the mean of its divisors is an integer number (28375623).

Almost surely, 2^107196781 is an apocalyptic number.

It is an amenable number.

107196781 is a deficient number, since it is larger than the sum of its proper divisors (6305711).

107196781 is an equidigital number, since it uses as much as digits as its factorization.

107196781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6305710.

The product of its (nonzero) digits is 21168, while the sum is 40.

The square root of 107196781 is about 10353.5878322444. The cubic root of 107196781 is about 475.0367927179.

The spelling of 107196781 in words is "one hundred seven million, one hundred ninety-six thousand, seven hundred eighty-one".