397543 has 2 divisors, whose sum is σ = 397544. Its totient is φ = 397542.

The previous prime is 397541. The next prime is 397547. The reversal of 397543 is 345793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397543 - 2¹ = 397541 is a prime.

Together with 397541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198771 + 198772.

It is an arithmetic number, because the mean of its divisors is an integer number (198772).

2³⁹⁷⁵⁴³ is an apocalyptic number.

397543 is a deficient number, since it is larger than the sum of its proper divisors (1).

397543 is an equidigital number, since it uses as much as digits as its factorization.

397543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 31.

The square root of 397543 is about 630.5101109419. The cubic root of 397543 is about 73.5294589364.

The spelling of 397543 in words is "three hundred ninety-seven thousand, five hundred forty-three".