164621101 has 2 divisors, whose sum is σ = 164621102. Its totient is φ = 164621100.

The previous prime is 164621099. The next prime is 164621117. The reversal of 164621101 is 101126461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118788201 + 45832900 = 10899^2 + 6770^2 .

It is an emirp because it is prime and its reverse (101126461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164621101 - 2¹ = 164621099 is a prime.

Together with 164621099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164621801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82310550 + 82310551.

It is an arithmetic number, because the mean of its divisors is an integer number (82310551).

Almost surely, 2^164621101 is an apocalyptic number.

It is an amenable number.

164621101 is a deficient number, since it is larger than the sum of its proper divisors (1).

164621101 is an equidigital number, since it uses as much as digits as its factorization.

164621101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 164621101 is about 12830.4754783289. The cubic root of 164621101 is about 548.0604975656.

Adding to 164621101 its reverse (101126461), we get a palindrome (265747562).

The spelling of 164621101 in words is "one hundred sixty-four million, six hundred twenty-one thousand, one hundred one".