163240173 has 6 divisors (see below), whose sum is σ = 235791374. Its totient is φ = 108826776.

The previous prime is 163240157. The next prime is 163240183. The reversal of 163240173 is 371042361.

It can be written as a sum of positive squares in only one way, i.e., 150258564 + 12981609 = 12258^2 + 3603^2 .

It is not a de Polignac number, because 163240173 - 2⁴ = 163240157 is a prime.

It is a super-3 number, since 3×163240173³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163240123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9068890 + ... + 9068907.

Almost surely, 2^163240173 is an apocalyptic number.

It is an amenable number.

163240173 is a deficient number, since it is larger than the sum of its proper divisors (72551201).

163240173 is a wasteful number, since it uses less digits than its factorization.

163240173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18137803 (or 18137800 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 163240173 is about 12776.5477731663. The cubic root of 163240173 is about 546.5237196059.

The spelling of 163240173 in words is "one hundred sixty-three million, two hundred forty thousand, one hundred seventy-three".