391227 has 4 divisors (see below), whose sum is σ = 521640. Its totient is φ = 260816.

The previous prime is 391219. The next prime is 391231. The reversal of 391227 is 722193.

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

It is a cyclic number.

It is not a de Polignac number, because 391227 - 2³ = 391219 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 391197 and 391206.

It is not an unprimeable number, because it can be changed into a prime (391217) 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, 65202 + ... + 65207.

It is an arithmetic number, because the mean of its divisors is an integer number (130410).

2³⁹¹²²⁷ is an apocalyptic number.

391227 is a deficient number, since it is larger than the sum of its proper divisors (130413).

391227 is a wasteful number, since it uses less digits than its factorization.

391227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130412.

The product of its digits is 756, while the sum is 24.

The square root of 391227 is about 625.4814145920. The cubic root of 391227 is about 73.1379763662.

The spelling of 391227 in words is "three hundred ninety-one thousand, two hundred twenty-seven".