164146439 has 4 divisors (see below), whose sum is σ = 164292960. Its totient is φ = 163999920.

The previous prime is 164146427. The next prime is 164146481. The reversal of 164146439 is 934641461.

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 164146439 - 2¹² = 164142343 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 (164146039) 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, 71567 + ... + 73824.

It is an arithmetic number, because the mean of its divisors is an integer number (41073240).

Almost surely, 2^164146439 is an apocalyptic number.

164146439 is a deficient number, since it is larger than the sum of its proper divisors (146521).

164146439 is a wasteful number, since it uses less digits than its factorization.

164146439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146520.

The product of its digits is 62208, while the sum is 38.

The square root of 164146439 is about 12811.9646814999. The cubic root of 164146439 is about 547.5332384622.

The spelling of 164146439 in words is "one hundred sixty-four million, one hundred forty-six thousand, four hundred thirty-nine".