164426321 has 2 divisors, whose sum is σ = 164426322. Its totient is φ = 164426320.

The previous prime is 164426309. The next prime is 164426371. The reversal of 164426321 is 123624461.

164426321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119683600 + 44742721 = 10940^2 + 6689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164426321 is a prime.

It is a super-3 number, since 3×164426321³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164426371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82213160 + 82213161.

It is an arithmetic number, because the mean of its divisors is an integer number (82213161).

Almost surely, 2^164426321 is an apocalyptic number.

It is an amenable number.

164426321 is a deficient number, since it is larger than the sum of its proper divisors (1).

164426321 is an equidigital number, since it uses as much as digits as its factorization.

164426321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 164426321 is about 12822.8827102177. The cubic root of 164426321 is about 547.8442568498.

The spelling of 164426321 in words is "one hundred sixty-four million, four hundred twenty-six thousand, three hundred twenty-one".