164120503 has 4 divisors (see below), whose sum is σ = 164953800. Its totient is φ = 163287208.

The previous prime is 164120491. The next prime is 164120507. The reversal of 164120503 is 305021461.

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 164120503 - 2⁵ = 164120471 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 (164120507) 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, 416353 + ... + 416746.

It is an arithmetic number, because the mean of its divisors is an integer number (41238450).

Almost surely, 2^164120503 is an apocalyptic number.

164120503 is a deficient number, since it is larger than the sum of its proper divisors (833297).

164120503 is an equidigital number, since it uses as much as digits as its factorization.

164120503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833296.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 164120503 is about 12810.9524626391. The cubic root of 164120503 is about 547.5043992335.

Adding to 164120503 its reverse (305021461), we get a palindrome (469141964).

The spelling of 164120503 in words is "one hundred sixty-four million, one hundred twenty thousand, five hundred three".