163673253 has 6 divisors (see below), whose sum is σ = 236416934. Its totient is φ = 109115496.

The previous prime is 163673249. The next prime is 163673269. The reversal of 163673253 is 352376361.

It can be written as a sum of positive squares in only one way, i.e., 162868644 + 804609 = 12762^2 + 897^2 .

It is not a de Polignac number, because 163673253 - 2² = 163673249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163673203) 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, 9092950 + ... + 9092967.

Almost surely, 2^163673253 is an apocalyptic number.

It is an amenable number.

163673253 is a deficient number, since it is larger than the sum of its proper divisors (72743681).

163673253 is a wasteful number, since it uses less digits than its factorization.

163673253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18185923 (or 18185920 counting only the distinct ones).

The product of its digits is 68040, while the sum is 36.

The square root of 163673253 is about 12793.4847871876. The cubic root of 163673253 is about 547.0066062277.

The spelling of 163673253 in words is "one hundred sixty-three million, six hundred seventy-three thousand, two hundred fifty-three".