391914 has 12 divisors (see below), whose sum is σ = 849186. Its totient is φ = 130632.

The previous prime is 391907. The next prime is 391921. The reversal of 391914 is 419193.

391914 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (391907) and next prime (391921).

It can be written as a sum of positive squares in only one way, i.e., 378225 + 13689 = 615^2 + 117^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 391914.

It is an unprimeable number.

391914 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 10869 + ... + 10904.

2³⁹¹⁹¹⁴ is an apocalyptic number.

391914 is an abundant number, since it is smaller than the sum of its proper divisors (457272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

391914 is a wasteful number, since it uses less digits than its factorization.

391914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21781 (or 21778 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 391914 is about 626.0303507019. The cubic root of 391914 is about 73.1807617633.

It can be divided in two parts, 39 and 1914, that added together give a triangular number (1953 = T₆₂).

The spelling of 391914 in words is "three hundred ninety-one thousand, nine hundred fourteen".