164432503 has 4 divisors (see below), whose sum is σ = 164469280. Its totient is φ = 164395728.

The previous prime is 164432501. The next prime is 164432519. The reversal of 164432503 is 305234461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164432503 - 2¹ = 164432501 is a prime.

It is a super-3 number, since 3×164432503³ (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 (164432501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10575 + ... + 20992.

It is an arithmetic number, because the mean of its divisors is an integer number (41117320).

Almost surely, 2^164432503 is an apocalyptic number.

164432503 is a deficient number, since it is larger than the sum of its proper divisors (36777).

164432503 is an equidigital number, since it uses as much as digits as its factorization.

164432503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36776.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 164432503 is about 12823.1237613929. The cubic root of 164432503 is about 547.8511226012.

Adding to 164432503 its reverse (305234461), we get a palindrome (469666964).

The spelling of 164432503 in words is "one hundred sixty-four million, four hundred thirty-two thousand, five hundred three".