393291 has 12 divisors (see below), whose sum is σ = 575640. Its totient is φ = 258720.

The previous prime is 393287. The next prime is 393299. The reversal of 393291 is 192393.

It is not a de Polignac number, because 393291 - 2² = 393287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (393299) 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, 556 + ... + 1046.

It is an arithmetic number, because the mean of its divisors is an integer number (47970).

2³⁹³²⁹¹ is an apocalyptic number.

393291 is a deficient number, since it is larger than the sum of its proper divisors (182349).

393291 is a wasteful number, since it uses less digits than its factorization.

393291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586 (or 583 counting only the distinct ones).

The product of its digits is 1458, while the sum is 27.

The square root of 393291 is about 627.1291732969. The cubic root of 393291 is about 73.2663690815.

The spelling of 393291 in words is "three hundred ninety-three thousand, two hundred ninety-one".