164146321 has 2 divisors, whose sum is σ = 164146322. Its totient is φ = 164146320.

The previous prime is 164146313. The next prime is 164146327. The reversal of 164146321 is 123641461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92929600 + 71216721 = 9640^2 + 8439^2 .

It is a cyclic number.

It is not a de Polignac number, because 164146321 - 2³ = 164146313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164146321.

It is not a weakly prime, because it can be changed into another prime (164146327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82073160 + 82073161.

It is an arithmetic number, because the mean of its divisors is an integer number (82073161).

Almost surely, 2^164146321 is an apocalyptic number.

It is an amenable number.

164146321 is a deficient number, since it is larger than the sum of its proper divisors (1).

164146321 is an equidigital number, since it uses as much as digits as its factorization.

164146321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 164146321 is about 12811.9600764286. The cubic root of 164146321 is about 547.5331072604.

Adding to 164146321 its reverse (123641461), we get a palindrome (287787782).

The spelling of 164146321 in words is "one hundred sixty-four million, one hundred forty-six thousand, three hundred twenty-one".