164320503 has 8 divisors (see below), whose sum is σ = 219225600. Its totient is φ = 109481208.

The previous prime is 164320459. The next prime is 164320517. The reversal of 164320503 is 305023461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164320503 - 2²⁴ = 147543287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164320523) 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 7 ways as a sum of consecutive naturals, for example, 10293 + ... + 20846.

It is an arithmetic number, because the mean of its divisors is an integer number (27403200).

Almost surely, 2^164320503 is an apocalyptic number.

164320503 is a deficient number, since it is larger than the sum of its proper divisors (54905097).

164320503 is a wasteful number, since it uses less digits than its factorization.

164320503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32901.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 164320503 is about 12818.7559068733. The cubic root of 164320503 is about 547.7267083053.

Adding to 164320503 its reverse (305023461), we get a palindrome (469343964).

The spelling of 164320503 in words is "one hundred sixty-four million, three hundred twenty thousand, five hundred three".