168613893 has 40 divisors (see below), whose sum is σ = 289029312. Its totient is φ = 95961024.

The previous prime is 168613889. The next prime is 168613903. The reversal of 168613893 is 398316861.

It is a happy number.

It is not a de Polignac number, because 168613893 - 2² = 168613889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168613813) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 196321 + ... + 197177.

Almost surely, 2^168613893 is an apocalyptic number.

It is an amenable number.

168613893 is a deficient number, since it is larger than the sum of its proper divisors (120415419).

168613893 is an equidigital number, since it uses as much as digits as its factorization.

168613893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223 (or 1214 counting only the distinct ones).

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

The square root of 168613893 is about 12985.1412391240. The cubic root of 168613893 is about 552.4561152124.

The spelling of 168613893 in words is "one hundred sixty-eight million, six hundred thirteen thousand, eight hundred ninety-three".