397827 has 6 divisors (see below), whose sum is σ = 574652. Its totient is φ = 265212.

The previous prime is 397811. The next prime is 397829. The reversal of 397827 is 728793.

It is not a de Polignac number, because 397827 - 2⁴ = 397811 is a prime.

It is a Duffinian number.

397827 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 397791 and 397800.

It is not an unprimeable number, because it can be changed into a prime (397829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22093 + ... + 22110.

2³⁹⁷⁸²⁷ is an apocalyptic number.

397827 is a deficient number, since it is larger than the sum of its proper divisors (176825).

397827 is a wasteful number, since it uses less digits than its factorization.

397827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44209 (or 44206 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 397827 is about 630.7352852029. The cubic root of 397827 is about 73.5469642928.

It can be divided in two parts, 3978 and 27, that added together give a triangular number (4005 = T₈₉).

The spelling of 397827 in words is "three hundred ninety-seven thousand, eight hundred twenty-seven".