391394 has 4 divisors (see below), whose sum is σ = 587094. Its totient is φ = 195696.

The previous prime is 391393. The next prime is 391397. The reversal of 391394 is 493193.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 375769 + 15625 = 613^2 + 125^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 391394.

It is not an unprimeable number, because it can be changed into a prime (391393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97847 + ... + 97850.

2³⁹¹³⁹⁴ is an apocalyptic number.

391394 is a deficient number, since it is larger than the sum of its proper divisors (195700).

391394 is a wasteful number, since it uses less digits than its factorization.

391394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195699.

The product of its digits is 2916, while the sum is 29.

The square root of 391394 is about 625.6148975208. The cubic root of 391394 is about 73.1483814972.

The spelling of 391394 in words is "three hundred ninety-one thousand, three hundred ninety-four".