326197381 has 2 divisors, whose sum is σ = 326197382. Its totient is φ = 326197380.

The previous prime is 326197373. The next prime is 326197471. The reversal of 326197381 is 183791623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318301281 + 7896100 = 17841^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 326197381 - 2³ = 326197373 is a prime.

It is a super-2 number, since 2×326197381² = 212809462742518322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326197321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163098690 + 163098691.

It is an arithmetic number, because the mean of its divisors is an integer number (163098691).

Almost surely, 2^326197381 is an apocalyptic number.

It is an amenable number.

326197381 is a deficient number, since it is larger than the sum of its proper divisors (1).

326197381 is an equidigital number, since it uses as much as digits as its factorization.

326197381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 326197381 is about 18060.9352194176. The cubic root of 326197381 is about 688.3777481257.

It can be divided in two parts, 32619 and 7381, that added together give a square (40000 = 200²).

The spelling of 326197381 in words is "three hundred twenty-six million, one hundred ninety-seven thousand, three hundred eighty-one".