164638339 has 2 divisors, whose sum is σ = 164638340. Its totient is φ = 164638338.

The previous prime is 164638337. The next prime is 164638349. The reversal of 164638339 is 933836461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164638339 - 2¹ = 164638337 is a prime.

Together with 164638337, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 164638295 and 164638304.

It is not a weakly prime, because it can be changed into another prime (164638337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82319169 + 82319170.

It is an arithmetic number, because the mean of its divisors is an integer number (82319170).

Almost surely, 2^164638339 is an apocalyptic number.

164638339 is a deficient number, since it is larger than the sum of its proper divisors (1).

164638339 is an equidigital number, since it uses as much as digits as its factorization.

164638339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 43.

The square root of 164638339 is about 12831.1472207282. The cubic root of 164638339 is about 548.0796266182.

The spelling of 164638339 in words is "one hundred sixty-four million, six hundred thirty-eight thousand, three hundred thirty-nine".