164423819 has 8 divisors (see below), whose sum is σ = 192991968. Its totient is φ = 137125440.

The previous prime is 164423773. The next prime is 164423821. The reversal of 164423819 is 918324461.

164423819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 164423819 - 2⁸ = 164423563 is a prime.

It is a super-3 number, since 3×164423819³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164423869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317162 + ... + 317679.

It is an arithmetic number, because the mean of its divisors is an integer number (24123996).

Almost surely, 2^164423819 is an apocalyptic number.

164423819 is a deficient number, since it is larger than the sum of its proper divisors (28568149).

164423819 is an equidigital number, since it uses as much as digits as its factorization.

164423819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634885.

The product of its digits is 41472, while the sum is 38.

The square root of 164423819 is about 12822.7851498807. The cubic root of 164423819 is about 547.8414780706.

The spelling of 164423819 in words is "one hundred sixty-four million, four hundred twenty-three thousand, eight hundred nineteen".