323135381 has 2 divisors, whose sum is σ = 323135382. Its totient is φ = 323135380.

The previous prime is 323135377. The next prime is 323135437. The reversal of 323135381 is 183531323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213598225 + 109537156 = 14615^2 + 10466^2 .

It is a cyclic number.

It is not a de Polignac number, because 323135381 - 2² = 323135377 is a prime.

It is a super-2 number, since 2×323135381² = 208832948908030322, 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 (323135321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161567690 + 161567691.

It is an arithmetic number, because the mean of its divisors is an integer number (161567691).

Almost surely, 2^323135381 is an apocalyptic number.

It is an amenable number.

323135381 is a deficient number, since it is larger than the sum of its proper divisors (1).

323135381 is an equidigital number, since it uses as much as digits as its factorization.

323135381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 323135381 is about 17975.9667612065. The cubic root of 323135381 is about 686.2170496111.

The spelling of 323135381 in words is "three hundred twenty-three million, one hundred thirty-five thousand, three hundred eighty-one".