326170421 has 2 divisors, whose sum is σ = 326170422. Its totient is φ = 326170420.

The previous prime is 326170391. The next prime is 326170423. The reversal of 326170421 is 124071623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176597521 + 149572900 = 13289^2 + 12230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326170421 is a prime.

Together with 326170423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326170423) 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, 163085210 + 163085211.

It is an arithmetic number, because the mean of its divisors is an integer number (163085211).

Almost surely, 2^326170421 is an apocalyptic number.

It is an amenable number.

326170421 is a deficient number, since it is larger than the sum of its proper divisors (1).

326170421 is an equidigital number, since it uses as much as digits as its factorization.

326170421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 326170421 is about 18060.1888417591. The cubic root of 326170421 is about 688.3587829464.

The spelling of 326170421 in words is "three hundred twenty-six million, one hundred seventy thousand, four hundred twenty-one".