350391 has 4 divisors (see below), whose sum is σ = 467192. Its totient is φ = 233592.

The previous prime is 350381. The next prime is 350411. The reversal of 350391 is 193053.

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

It is a de Polignac number, because none of the positive numbers 2^k-350391 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58396 + ... + 58401.

It is an arithmetic number, because the mean of its divisors is an integer number (116798).

2³⁵⁰³⁹¹ is an apocalyptic number.

350391 is a deficient number, since it is larger than the sum of its proper divisors (116801).

350391 is a wasteful number, since it uses less digits than its factorization.

350391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116800.

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 350391 is about 591.9383413836. The cubic root of 350391 is about 70.4992203525.

It can be divided in two parts, 350 and 391, that added together give a triangular number (741 = T₃₈).

The spelling of 350391 in words is "three hundred fifty thousand, three hundred ninety-one".