163899893 has 2 divisors, whose sum is σ = 163899894. Its totient is φ = 163899892.

The previous prime is 163899887. The next prime is 163899913. The reversal of 163899893 is 398998361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92294449 + 71605444 = 9607^2 + 8462^2 .

It is a cyclic number.

It is not a de Polignac number, because 163899893 - 2⁴ = 163899877 is a prime.

It is a super-2 number, since 2×163899893² = 53726349850822898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163899803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81949946 + 81949947.

It is an arithmetic number, because the mean of its divisors is an integer number (81949947).

Almost surely, 2^163899893 is an apocalyptic number.

It is an amenable number.

163899893 is a deficient number, since it is larger than the sum of its proper divisors (1).

163899893 is an equidigital number, since it uses as much as digits as its factorization.

163899893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 56.

The square root of 163899893 is about 12802.3393565395. The cubic root of 163899893 is about 547.2589716294.

The spelling of 163899893 in words is "one hundred sixty-three million, eight hundred ninety-nine thousand, eight hundred ninety-three".