163928893 has 2 divisors, whose sum is σ = 163928894. Its totient is φ = 163928892.

The previous prime is 163928887. The next prime is 163928911. The reversal of 163928893 is 398829361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159820164 + 4108729 = 12642^2 + 2027^2 .

It is a cyclic number.

It is not a de Polignac number, because 163928893 - 2⁹ = 163928381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163928803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81964446 + 81964447.

It is an arithmetic number, because the mean of its divisors is an integer number (81964447).

Almost surely, 2^163928893 is an apocalyptic number.

It is an amenable number.

163928893 is a deficient number, since it is larger than the sum of its proper divisors (1).

163928893 is an equidigital number, since it uses as much as digits as its factorization.

163928893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 163928893 is about 12803.4719119464. The cubic root of 163928893 is about 547.2912465625.

The spelling of 163928893 in words is "one hundred sixty-three million, nine hundred twenty-eight thousand, eight hundred ninety-three".