391113 has 6 divisors (see below), whose sum is σ = 564954. Its totient is φ = 260736.

The previous prime is 391103. The next prime is 391117. The reversal of 391113 is 311193.

It can be written as a sum of positive squares in only one way, i.e., 345744 + 45369 = 588^2 + 213^2 .

It is not a de Polignac number, because 391113 - 2⁶ = 391049 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (391117) 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 5 ways as a sum of consecutive naturals, for example, 21720 + ... + 21737.

It is an arithmetic number, because the mean of its divisors is an integer number (94159).

2³⁹¹¹¹³ is an apocalyptic number.

It is an amenable number.

391113 is a deficient number, since it is larger than the sum of its proper divisors (173841).

391113 is a wasteful number, since it uses less digits than its factorization.

391113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43463 (or 43460 counting only the distinct ones).

The product of its digits is 81, while the sum is 18.

The square root of 391113 is about 625.3902781464. The cubic root of 391113 is about 73.1308717617.

The spelling of 391113 in words is "three hundred ninety-one thousand, one hundred thirteen".