163603973 has 16 divisors (see below), whose sum is σ = 182327040. Its totient is φ = 145820736.

The previous prime is 163603967. The next prime is 163603987. The reversal of 163603973 is 379306361.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 163603973 - 2⁸ = 163603717 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 (163603933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65636 + ... + 68082.

It is an arithmetic number, because the mean of its divisors is an integer number (11395440).

Almost surely, 2^163603973 is an apocalyptic number.

163603973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

163603973 is a deficient number, since it is larger than the sum of its proper divisors (18723067).

163603973 is a wasteful number, since it uses less digits than its factorization.

163603973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 163603973 is about 12790.7768724187. The cubic root of 163603973 is about 546.9294159208.

The spelling of 163603973 in words is "one hundred sixty-three million, six hundred three thousand, nine hundred seventy-three".