348391 has 4 divisors (see below), whose sum is σ = 351072. Its totient is φ = 345712.

The previous prime is 348389. The next prime is 348401. The reversal of 348391 is 193843.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 348391 - 2¹ = 348389 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 (348191) 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, 1135 + ... + 1408.

It is an arithmetic number, because the mean of its divisors is an integer number (87768).

2³⁴⁸³⁹¹ is an apocalyptic number.

348391 is the 316-th centered heptagonal number.

348391 is a deficient number, since it is larger than the sum of its proper divisors (2681).

348391 is a wasteful number, since it uses less digits than its factorization.

348391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680.

The product of its digits is 2592, while the sum is 28.

The square root of 348391 is about 590.2465586516. The cubic root of 348391 is about 70.3648299492.

The spelling of 348391 in words is "three hundred forty-eight thousand, three hundred ninety-one".