168613938 has 12 divisors (see below), whose sum is σ = 365330238. Its totient is φ = 56204640.

The previous prime is 168613933. The next prime is 168613979. The reversal of 168613938 is 839316861.

It is a happy number.

168613938 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 155675529 + 12938409 = 12477^2 + 3597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 168613893 and 168613902.

It is not an unprimeable number, because it can be changed into a prime (168613933) 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 5 ways as a sum of consecutive naturals, for example, 4683703 + ... + 4683738.

Almost surely, 2^168613938 is an apocalyptic number.

168613938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

168613938 is an abundant number, since it is smaller than the sum of its proper divisors (196716300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168613938 is a wasteful number, since it uses less digits than its factorization.

168613938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9367449 (or 9367446 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 168613938 is about 12985.1429718737. The cubic root of 168613938 is about 552.4561643593.

The spelling of 168613938 in words is "one hundred sixty-eight million, six hundred thirteen thousand, nine hundred thirty-eight".