164144423 has 4 divisors (see below), whose sum is σ = 165151608. Its totient is φ = 163137240.

The previous prime is 164144419. The next prime is 164144447. The reversal of 164144423 is 324441461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324441461 = 53 ⋅6121537.

It is a cyclic number.

It is not a de Polignac number, because 164144423 - 2² = 164144419 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 (164144413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503348 + ... + 503673.

It is an arithmetic number, because the mean of its divisors is an integer number (41287902).

Almost surely, 2^164144423 is an apocalyptic number.

164144423 is a deficient number, since it is larger than the sum of its proper divisors (1007185).

164144423 is a wasteful number, since it uses less digits than its factorization.

164144423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007184.

The product of its digits is 9216, while the sum is 29.

The square root of 164144423 is about 12811.8860048004. The cubic root of 164144423 is about 547.5309969037.

Adding to 164144423 its reverse (324441461), we get a palindrome (488585884).

It can be divided in two parts, 1641 and 44423, that added together give a palindrome (46064).

The spelling of 164144423 in words is "one hundred sixty-four million, one hundred forty-four thousand, four hundred twenty-three".