393091 has 8 divisors (see below), whose sum is σ = 438480. Its totient is φ = 350208.

The previous prime is 393083. The next prime is 393097. The reversal of 393091 is 190393.

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

It is not a de Polignac number, because 393091 - 2³ = 393083 is a prime.

It is a Duffinian number.

393091 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393097) 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, 286 + ... + 931.

It is an arithmetic number, because the mean of its divisors is an integer number (54810).

2³⁹³⁰⁹¹ is an apocalyptic number.

393091 is a deficient number, since it is larger than the sum of its proper divisors (45389).

393091 is a wasteful number, since it uses less digits than its factorization.

393091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 393091 is about 626.9696962374. The cubic root of 393091 is about 73.2539476104.

The spelling of 393091 in words is "three hundred ninety-three thousand, ninety-one".