397427 has 2 divisors, whose sum is σ = 397428. Its totient is φ = 397426.

The previous prime is 397379. The next prime is 397429. The reversal of 397427 is 724793.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397427 - 2¹² = 393331 is a prime.

Together with 397429, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 397393 and 397402.

It is not a weakly prime, because it can be changed into another prime (397429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198713 + 198714.

It is an arithmetic number, because the mean of its divisors is an integer number (198714).

2³⁹⁷⁴²⁷ is an apocalyptic number.

397427 is a deficient number, since it is larger than the sum of its proper divisors (1).

397427 is an equidigital number, since it uses as much as digits as its factorization.

397427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 32.

The square root of 397427 is about 630.4181152220. The cubic root of 397427 is about 73.5223064632.

The spelling of 397427 in words is "three hundred ninety-seven thousand, four hundred twenty-seven".