323239681 has 4 divisors (see below), whose sum is σ = 324914692. Its totient is φ = 321564672.

The previous prime is 323239669. The next prime is 323239687. The reversal of 323239681 is 186932323.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186932323 = 17 ⋅10996019.

It can be written as a sum of positive squares in 2 ways, for example, as 198359056 + 124880625 = 14084^2 + 11175^2 .

It is a cyclic number.

It is not a de Polignac number, because 323239681 - 2²⁷ = 189021953 is a prime.

It is a super-3 number, since 3×323239681³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 323239681.

It is not an unprimeable number, because it can be changed into a prime (323239687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837216 + ... + 837601.

It is an arithmetic number, because the mean of its divisors is an integer number (81228673).

Almost surely, 2^323239681 is an apocalyptic number.

It is an amenable number.

323239681 is a deficient number, since it is larger than the sum of its proper divisors (1675011).

323239681 is a wasteful number, since it uses less digits than its factorization.

323239681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675010.

The product of its digits is 46656, while the sum is 37.

The square root of 323239681 is about 17978.8676228510. The cubic root of 323239681 is about 686.2908728889.

The spelling of 323239681 in words is "three hundred twenty-three million, two hundred thirty-nine thousand, six hundred eighty-one".