163156673 has 2 divisors, whose sum is σ = 163156674. Its totient is φ = 163156672.

The previous prime is 163156661. The next prime is 163156691. The reversal of 163156673 is 376651361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162613504 + 543169 = 12752^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 163156673 - 2⁴ = 163156657 is a prime.

It is not a weakly prime, because it can be changed into another prime (163156373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81578336 + 81578337.

It is an arithmetic number, because the mean of its divisors is an integer number (81578337).

Almost surely, 2^163156673 is an apocalyptic number.

It is an amenable number.

163156673 is a deficient number, since it is larger than the sum of its proper divisors (1).

163156673 is an equidigital number, since it uses as much as digits as its factorization.

163156673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 38.

The square root of 163156673 is about 12773.2796493305. The cubic root of 163156673 is about 546.4305184595.

The spelling of 163156673 in words is "one hundred sixty-three million, one hundred fifty-six thousand, six hundred seventy-three".