391355 has 8 divisors (see below), whose sum is σ = 486000. Its totient is φ = 302176.

The previous prime is 391351. The next prime is 391367. The reversal of 391355 is 553193.

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 391355 - 2² = 391351 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (391351) 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, 1205 + ... + 1494.

It is an arithmetic number, because the mean of its divisors is an integer number (60750).

391355 is a Friedman number, since it can be written as 9^3+5^(5+3)+1, using all its digits and the basic arithmetic operations.

2³⁹¹³⁵⁵ is an apocalyptic number.

391355 is a deficient number, since it is larger than the sum of its proper divisors (94645).

391355 is a wasteful number, since it uses less digits than its factorization.

391355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733.

The product of its digits is 2025, while the sum is 26.

The square root of 391355 is about 625.5837274098. The cubic root of 391355 is about 73.1459518213.

The spelling of 391355 in words is "three hundred ninety-one thousand, three hundred fifty-five".