109868161 has 8 divisors (see below), whose sum is σ = 125279784. Its totient is φ = 95450880.

The previous prime is 109868147. The next prime is 109868173. The reversal of 109868161 is 161868901.

It can be written as a sum of positive squares in 4 ways, for example, as 22090000 + 87778161 = 4700^2 + 9369^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109868161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109868191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248350 + ... + 248791.

It is an arithmetic number, because the mean of its divisors is an integer number (15659973).

Almost surely, 2^109868161 is an apocalyptic number.

It is an amenable number.

109868161 is a deficient number, since it is larger than the sum of its proper divisors (15411623).

109868161 is a wasteful number, since it uses less digits than its factorization.

109868161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497171.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 109868161 is about 10481.8014196034. The cubic root of 109868161 is about 478.9504861484.

The spelling of 109868161 in words is "one hundred nine million, eight hundred sixty-eight thousand, one hundred sixty-one".