163624889 has 2 divisors, whose sum is σ = 163624890. Its totient is φ = 163624888.

The previous prime is 163624883. The next prime is 163624919. The reversal of 163624889 is 988426361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158256400 + 5368489 = 12580^2 + 2317^2 .

It is a cyclic number.

It is not a de Polignac number, because 163624889 - 2²⁰ = 162576313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163624883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81812444 + 81812445.

It is an arithmetic number, because the mean of its divisors is an integer number (81812445).

Almost surely, 2^163624889 is an apocalyptic number.

It is an amenable number.

163624889 is a deficient number, since it is larger than the sum of its proper divisors (1).

163624889 is an equidigital number, since it uses as much as digits as its factorization.

163624889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 47.

The square root of 163624889 is about 12791.5944666801. The cubic root of 163624889 is about 546.9527223804.

The spelling of 163624889 in words is "one hundred sixty-three million, six hundred twenty-four thousand, eight hundred eighty-nine".