321368919 has 8 divisors (see below), whose sum is σ = 433916160. Its totient is φ = 211533816.

The previous prime is 321368911. The next prime is 321368959. The reversal of 321368919 is 919863123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321368919 - 2³ = 321368911 is a prime.

It is a super-2 number, since 2×321368919² = 206555964198457122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321368911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677757 + ... + 678230.

It is an arithmetic number, because the mean of its divisors is an integer number (54239520).

Almost surely, 2^321368919 is an apocalyptic number.

321368919 is a deficient number, since it is larger than the sum of its proper divisors (112547241).

321368919 is a wasteful number, since it uses less digits than its factorization.

321368919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356069.

The product of its digits is 69984, while the sum is 42.

The square root of 321368919 is about 17926.7654360735. The cubic root of 321368919 is about 684.9643322398.

The spelling of 321368919 in words is "three hundred twenty-one million, three hundred sixty-eight thousand, nine hundred nineteen".