168214861 has 4 divisors (see below), whose sum is σ = 168241500. Its totient is φ = 168188224.

The previous prime is 168214853. The next prime is 168214903. The reversal of 168214861 is 168412861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 168412861 = 4483 ⋅37567.

It can be written as a sum of positive squares in 2 ways, for example, as 90440100 + 77774761 = 9510^2 + 8819^2 .

It is a cyclic number.

It is not a de Polignac number, because 168214861 - 2³ = 168214853 is a prime.

It is a super-2 number, since 2×168214861² = 56592478922498642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168214861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168214811) 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 3 ways as a sum of consecutive naturals, for example, 2115 + ... + 18463.

It is an arithmetic number, because the mean of its divisors is an integer number (42060375).

Almost surely, 2^168214861 is an apocalyptic number.

It is an amenable number.

168214861 is a deficient number, since it is larger than the sum of its proper divisors (26639).

168214861 is a wasteful number, since it uses less digits than its factorization.

168214861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26638.

The product of its digits is 18432, while the sum is 37.

The square root of 168214861 is about 12969.7671914341. The cubic root of 168214861 is about 552.0199672904.

It can be divided in two parts, 1682148 and 61, that added together give a square (1682209 = 1297²).

The spelling of 168214861 in words is "one hundred sixty-eight million, two hundred fourteen thousand, eight hundred sixty-one".