164638349 has 2 divisors, whose sum is σ = 164638350. Its totient is φ = 164638348.

The previous prime is 164638339. The next prime is 164638361. The reversal of 164638349 is 943836461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90592324 + 74046025 = 9518^2 + 8605^2 .

It is an emirp because it is prime and its reverse (943836461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164638349 - 2²⁰ = 163589773 is a prime.

It is a super-2 number, since 2×164638349² = 54211571922891602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164638339) 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 as a sum of consecutive naturals, namely, 82319174 + 82319175.

It is an arithmetic number, because the mean of its divisors is an integer number (82319175).

Almost surely, 2^164638349 is an apocalyptic number.

It is an amenable number.

164638349 is a deficient number, since it is larger than the sum of its proper divisors (1).

164638349 is an equidigital number, since it uses as much as digits as its factorization.

164638349 is an odious number, because the sum of its binary digits is odd.

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

The square root of 164638349 is about 12831.1476104049. The cubic root of 164638349 is about 548.0796377149.

The spelling of 164638349 in words is "one hundred sixty-four million, six hundred thirty-eight thousand, three hundred forty-nine".