163009503 has 28 divisors (see below), whose sum is σ = 249072840. Its totient is φ = 106597296.

The previous prime is 163009499. The next prime is 163009513. The reversal of 163009503 is 305900361.

It is not a de Polignac number, because 163009503 - 2² = 163009499 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163009513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 36528 + ... + 40746.

Almost surely, 2^163009503 is an apocalyptic number.

163009503 is a deficient number, since it is larger than the sum of its proper divisors (86063337).

163009503 is an frugal number, since it uses more digits than its factorization.

163009503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290 (or 4275 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 163009503 is about 12767.5174955823. The cubic root of 163009503 is about 546.2661725999.

Adding to 163009503 its reverse (305900361), we get a palindrome (468909864).

The spelling of 163009503 in words is "one hundred sixty-three million, nine thousand, five hundred three".