323312981 has 4 divisors (see below), whose sum is σ = 333742464. Its totient is φ = 312883500.

The previous prime is 323312959. The next prime is 323312999. The reversal of 323312981 is 189213323.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189213323 = 13 ⋅14554871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-323312981 is a prime.

It is a super-2 number, since 2×323312981² = 209062567366212722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323012981) 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, 5214695 + ... + 5214756.

It is an arithmetic number, because the mean of its divisors is an integer number (83435616).

Almost surely, 2^323312981 is an apocalyptic number.

323312981 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

323312981 is a deficient number, since it is larger than the sum of its proper divisors (10429483).

323312981 is a wasteful number, since it uses less digits than its factorization.

323312981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10429482.

The product of its digits is 7776, while the sum is 32.

The square root of 323312981 is about 17980.9060116558. The cubic root of 323312981 is about 686.3427449433.

The spelling of 323312981 in words is "three hundred twenty-three million, three hundred twelve thousand, nine hundred eighty-one".