163494889 has 2 divisors, whose sum is σ = 163494890. Its totient is φ = 163494888.

The previous prime is 163494871. The next prime is 163494893. The reversal of 163494889 is 988494361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160909225 + 2585664 = 12685^2 + 1608^2 .

It is a cyclic number.

It is not a de Polignac number, because 163494889 - 2⁵ = 163494857 is a prime.

It is not a weakly prime, because it can be changed into another prime (163494809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81747444 + 81747445.

It is an arithmetic number, because the mean of its divisors is an integer number (81747445).

Almost surely, 2^163494889 is an apocalyptic number.

It is an amenable number.

163494889 is a deficient number, since it is larger than the sum of its proper divisors (1).

163494889 is an equidigital number, since it uses as much as digits as its factorization.

163494889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 52.

The square root of 163494889 is about 12786.5119950673. The cubic root of 163494889 is about 546.8078326608.

The spelling of 163494889 in words is "one hundred sixty-three million, four hundred ninety-four thousand, eight hundred eighty-nine".