327670381 has 2 divisors, whose sum is σ = 327670382. Its totient is φ = 327670380.

The previous prime is 327670379. The next prime is 327670423. The reversal of 327670381 is 183076723.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297045225 + 30625156 = 17235^2 + 5534^2 .

It is a cyclic number.

It is not a de Polignac number, because 327670381 - 2¹ = 327670379 is a prime.

It is a super-2 number, since 2×327670381² = 214735757169370322, which contains 22 as substring.

Together with 327670379, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 327670381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (327670331) 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, 163835190 + 163835191.

It is an arithmetic number, because the mean of its divisors is an integer number (163835191).

Almost surely, 2^327670381 is an apocalyptic number.

327670381 is the 11449-th centered pentagonal number.

It is an amenable number.

327670381 is a deficient number, since it is larger than the sum of its proper divisors (1).

327670381 is an equidigital number, since it uses as much as digits as its factorization.

327670381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 327670381 is about 18101.6679065770. The cubic root of 327670381 is about 689.4123548108.

The spelling of 327670381 in words is "three hundred twenty-seven million, six hundred seventy thousand, three hundred eighty-one".