391371 has 4 divisors (see below), whose sum is σ = 521832. Its totient is φ = 260912.

The previous prime is 391367. The next prime is 391373. The reversal of 391371 is 173193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 173193 = 3 ⋅57731.

It is a cyclic number.

It is not a de Polignac number, because 391371 - 2² = 391367 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (391373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65226 + ... + 65231.

It is an arithmetic number, because the mean of its divisors is an integer number (130458).

2³⁹¹³⁷¹ is an apocalyptic number.

391371 is a deficient number, since it is larger than the sum of its proper divisors (130461).

391371 is a wasteful number, since it uses less digits than its factorization.

391371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130460.

The product of its digits is 567, while the sum is 24.

The square root of 391371 is about 625.5965153356. The cubic root of 391371 is about 73.1469486309.

The spelling of 391371 in words is "three hundred ninety-one thousand, three hundred seventy-one".