326306389 has 2 divisors, whose sum is σ = 326306390. Its totient is φ = 326306388.

The previous prime is 326306377. The next prime is 326306429. The reversal of 326306389 is 983603623.

It is an a-pointer prime, because the next prime (326306429) can be obtained adding 326306389 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310640625 + 15665764 = 17625^2 + 3958^2 .

It is an emirp because it is prime and its reverse (983603623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 326306389 - 2¹³ = 326298197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326306329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163153194 + 163153195.

It is an arithmetic number, because the mean of its divisors is an integer number (163153195).

Almost surely, 2^326306389 is an apocalyptic number.

It is an amenable number.

326306389 is a deficient number, since it is larger than the sum of its proper divisors (1).

326306389 is an equidigital number, since it uses as much as digits as its factorization.

326306389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 326306389 is about 18063.9527512668. The cubic root of 326306389 is about 688.4544198269.

The spelling of 326306389 in words is "three hundred twenty-six million, three hundred six thousand, three hundred eighty-nine".