163123009 has 6 divisors (see below), whose sum is σ = 189755394. Its totient is φ = 139819680.

The previous prime is 163123003. The next prime is 163123039. The reversal of 163123009 is 900321361.

It can be written as a sum of positive squares in only one way, i.e., 162307600 + 815409 = 12740^2 + 903^2 .

It is not a de Polignac number, because 163123009 - 2³ = 163123001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163123001) 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 in 5 ways as a sum of consecutive naturals, for example, 1664472 + ... + 1664569.

It is an arithmetic number, because the mean of its divisors is an integer number (31625899).

Almost surely, 2^163123009 is an apocalyptic number.

It is an amenable number.

163123009 is a deficient number, since it is larger than the sum of its proper divisors (26632385).

163123009 is an equidigital number, since it uses as much as digits as its factorization.

163123009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329055 (or 3329048 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 163123009 is about 12771.9618305098. The cubic root of 163123009 is about 546.3929343347.

It can be divided in two parts, 16312 and 3009, that added together give a square (19321 = 139²).

The spelling of 163123009 in words is "one hundred sixty-three million, one hundred twenty-three thousand, nine".