391343 has 8 divisors (see below), whose sum is σ = 422400. Its totient is φ = 361368.

The previous prime is 391337. The next prime is 391351. The reversal of 391343 is 343193.

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

It is a cyclic number.

It is not a de Polignac number, because 391343 - 2¹⁶ = 325807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578 + ... + 1056.

It is an arithmetic number, because the mean of its divisors is an integer number (52800).

2³⁹¹³⁴³ is an apocalyptic number.

391343 is a deficient number, since it is larger than the sum of its proper divisors (31057).

391343 is a wasteful number, since it uses less digits than its factorization.

391343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

The product of its digits is 972, while the sum is 23.

The square root of 391343 is about 625.5741362940. The cubic root of 391343 is about 73.1452041963.

The spelling of 391343 in words is "three hundred ninety-one thousand, three hundred forty-three".