326866381 has 2 divisors, whose sum is σ = 326866382. Its totient is φ = 326866380.

The previous prime is 326866369. The next prime is 326866427. The reversal of 326866381 is 183668623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283754025 + 43112356 = 16845^2 + 6566^2 .

It is a cyclic number.

It is not a de Polignac number, because 326866381 - 2²¹ = 324769229 is a prime.

It is a super-2 number, since 2×326866381² = 213683262056074322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326866301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163433190 + 163433191.

It is an arithmetic number, because the mean of its divisors is an integer number (163433191).

Almost surely, 2^326866381 is an apocalyptic number.

It is an amenable number.

326866381 is a deficient number, since it is larger than the sum of its proper divisors (1).

326866381 is an equidigital number, since it uses as much as digits as its factorization.

326866381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 326866381 is about 18079.4463687360. The cubic root of 326866381 is about 688.8480260082.

The spelling of 326866381 in words is "three hundred twenty-six million, eight hundred sixty-six thousand, three hundred eighty-one".