397211 has 2 divisors, whose sum is σ = 397212. Its totient is φ = 397210.

The previous prime is 397183. The next prime is 397217. The reversal of 397211 is 112793.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (397217) 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, 198605 + 198606.

It is an arithmetic number, because the mean of its divisors is an integer number (198606).

2³⁹⁷²¹¹ is an apocalyptic number.

397211 is a deficient number, since it is larger than the sum of its proper divisors (1).

397211 is an equidigital number, since it uses as much as digits as its factorization.

397211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 23.

The square root of 397211 is about 630.2467770643. The cubic root of 397211 is about 73.5089843553.

The spelling of 397211 in words is "three hundred ninety-seven thousand, two hundred eleven".