321378343 has 12 divisors (see below), whose sum is σ = 379640088. Its totient is φ = 269686560.

The previous prime is 321378341. The next prime is 321378359. The reversal of 321378343 is 343873123.

It is not a de Polignac number, because 321378343 - 2¹ = 321378341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321378299 and 321378308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321378341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84580 + ... + 88297.

It is an arithmetic number, because the mean of its divisors is an integer number (31636674).

Almost surely, 2^321378343 is an apocalyptic number.

321378343 is a deficient number, since it is larger than the sum of its proper divisors (58261745).

321378343 is a wasteful number, since it uses less digits than its factorization.

321378343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172914 (or 172901 counting only the distinct ones).

The product of its digits is 36288, while the sum is 34.

The square root of 321378343 is about 17927.0282813410. The cubic root of 321378343 is about 684.9710275987.

The spelling of 321378343 in words is "three hundred twenty-one million, three hundred seventy-eight thousand, three hundred forty-three".