326678641 has 2 divisors, whose sum is σ = 326678642. Its totient is φ = 326678640.

The previous prime is 326678629. The next prime is 326678657. The reversal of 326678641 is 146876623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220671025 + 106007616 = 14855^2 + 10296^2 .

It is an emirp because it is prime and its reverse (146876623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 326678641 - 2⁹ = 326678129 is a prime.

It is not a weakly prime, because it can be changed into another prime (326678441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163339320 + 163339321.

It is an arithmetic number, because the mean of its divisors is an integer number (163339321).

Almost surely, 2^326678641 is an apocalyptic number.

It is an amenable number.

326678641 is a deficient number, since it is larger than the sum of its proper divisors (1).

326678641 is an equidigital number, since it uses as much as digits as its factorization.

326678641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 326678641 is about 18074.2535392198. The cubic root of 326678641 is about 688.7161177795.

The spelling of 326678641 in words is "three hundred twenty-six million, six hundred seventy-eight thousand, six hundred forty-one".