164604443 has 4 divisors (see below), whose sum is σ = 164633928. Its totient is φ = 164574960.

The previous prime is 164604437. The next prime is 164604457. The reversal of 164604443 is 344406461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344406461 = 7 ⋅49200923.

It is a cyclic number.

It is not a de Polignac number, because 164604443 - 2¹⁰ = 164603419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164604943) 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, 3521 + ... + 18482.

It is an arithmetic number, because the mean of its divisors is an integer number (41158482).

Almost surely, 2^164604443 is an apocalyptic number.

164604443 is a deficient number, since it is larger than the sum of its proper divisors (29485).

164604443 is an equidigital number, since it uses as much as digits as its factorization.

164604443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29484.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 164604443 is about 12829.8263043581. The cubic root of 164604443 is about 548.0420108717.

The spelling of 164604443 in words is "one hundred sixty-four million, six hundred four thousand, four hundred forty-three".