164384639 has 6 divisors (see below), whose sum is σ = 166106304. Its totient is φ = 162680640.

The previous prime is 164384629. The next prime is 164384677. The reversal of 164384639 is 936483461.

It is a de Polignac number, because none of the positive numbers 2^k-164384639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164384639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164384629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 674 + ... + 18144.

It is an arithmetic number, because the mean of its divisors is an integer number (27684384).

Almost surely, 2^164384639 is an apocalyptic number.

164384639 is a deficient number, since it is larger than the sum of its proper divisors (1721665).

164384639 is an frugal number, since it uses more digits than its factorization.

164384639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17665 (or 17568 counting only the distinct ones).

The product of its digits is 373248, while the sum is 44.

The square root of 164384639 is about 12821.2573096401. The cubic root of 164384639 is about 547.7979601782.

The spelling of 164384639 in words is "one hundred sixty-four million, three hundred eighty-four thousand, six hundred thirty-nine".