168303861 has 36 divisors (see below), whose sum is σ = 274502956. Its totient is φ = 99221760.

The previous prime is 168303853. The next prime is 168303869.

168303861 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (168303853) and next prime (168303869).

It can be written as a sum of positive squares in 2 ways, for example, as 153140625 + 15163236 = 12375^2 + 3894^2 .

It is not a de Polignac number, because 168303861 - 2³ = 168303853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168303869) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38205 + ... + 42381.

Almost surely, 2^168303861 is an apocalyptic number.

168303861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

168303861 is a deficient number, since it is larger than the sum of its proper divisors (106199095).

168303861 is a wasteful number, since it uses less digits than its factorization.

168303861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242 (or 4228 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 168303861 is about 12973.1977939134. The cubic root of 168303861 is about 552.1173053312.

The spelling of 168303861 in words is "one hundred sixty-eight million, three hundred three thousand, eight hundred sixty-one".