326742389 has 2 divisors, whose sum is σ = 326742390. Its totient is φ = 326742388.

The previous prime is 326742359. The next prime is 326742443. The reversal of 326742389 is 983247623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260564164 + 66178225 = 16142^2 + 8135^2 .

It is a cyclic number.

It is not a de Polignac number, because 326742389 - 2²⁰ = 325693813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326742349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163371194 + 163371195.

It is an arithmetic number, because the mean of its divisors is an integer number (163371195).

Almost surely, 2^326742389 is an apocalyptic number.

It is an amenable number.

326742389 is a deficient number, since it is larger than the sum of its proper divisors (1).

326742389 is an equidigital number, since it uses as much as digits as its factorization.

326742389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 44.

The square root of 326742389 is about 18076.0169561770. The cubic root of 326742389 is about 688.7609135043.

The spelling of 326742389 in words is "three hundred twenty-six million, seven hundred forty-two thousand, three hundred eighty-nine".