326143661 has 2 divisors, whose sum is σ = 326143662. Its totient is φ = 326143660.

The previous prime is 326143577. The next prime is 326143673. The reversal of 326143661 is 166341623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316626436 + 9517225 = 17794^2 + 3085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326143661 is a prime.

It is a super-2 number, since 2×326143661² = 212739375220965842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326143061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163071830 + 163071831.

It is an arithmetic number, because the mean of its divisors is an integer number (163071831).

Almost surely, 2^326143661 is an apocalyptic number.

It is an amenable number.

326143661 is a deficient number, since it is larger than the sum of its proper divisors (1).

326143661 is an equidigital number, since it uses as much as digits as its factorization.

326143661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

The square root of 326143661 is about 18059.4479705222. The cubic root of 326143661 is about 688.3399574249.

The spelling of 326143661 in words is "three hundred twenty-six million, one hundred forty-three thousand, six hundred sixty-one".