163785887 has 2 divisors, whose sum is σ = 163785888. Its totient is φ = 163785886.

The previous prime is 163785859. The next prime is 163785893. The reversal of 163785887 is 788587361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163785887 - 2¹⁸ = 163523743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163785827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81892943 + 81892944.

It is an arithmetic number, because the mean of its divisors is an integer number (81892944).

Almost surely, 2^163785887 is an apocalyptic number.

163785887 is a deficient number, since it is larger than the sum of its proper divisors (1).

163785887 is an equidigital number, since it uses as much as digits as its factorization.

163785887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 53.

The square root of 163785887 is about 12797.8860363734. The cubic root of 163785887 is about 547.1320541622.

The spelling of 163785887 in words is "one hundred sixty-three million, seven hundred eighty-five thousand, eight hundred eighty-seven".