168727861 has 4 divisors (see below), whose sum is σ = 168828300. Its totient is φ = 168627424.

The previous prime is 168727843. The next prime is 168727877.

168727861 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39450961 + 129276900 = 6281^2 + 11370^2 .

It is a cyclic number.

It is not a de Polignac number, because 168727861 - 2¹³ = 168719669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168727831) 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 3 ways as a sum of consecutive naturals, for example, 47656 + ... + 51073.

It is an arithmetic number, because the mean of its divisors is an integer number (42207075).

Almost surely, 2^168727861 is an apocalyptic number.

It is an amenable number.

168727861 is a deficient number, since it is larger than the sum of its proper divisors (100439).

168727861 is an equidigital number, since it uses as much as digits as its factorization.

168727861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100438.

The product of its digits is 225792, while the sum is 46.

The square root of 168727861 is about 12989.5288983088. The cubic root of 168727861 is about 552.5805575841.

The spelling of 168727861 in words is "one hundred sixty-eight million, seven hundred twenty-seven thousand, eight hundred sixty-one".