398543 has 2 divisors, whose sum is σ = 398544. Its totient is φ = 398542.

The previous prime is 398539. The next prime is 398549. The reversal of 398543 is 345893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398543 - 2² = 398539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199271 + 199272.

It is an arithmetic number, because the mean of its divisors is an integer number (199272).

2³⁹⁸⁵⁴³ is an apocalyptic number.

398543 is a deficient number, since it is larger than the sum of its proper divisors (1).

398543 is an equidigital number, since it uses as much as digits as its factorization.

398543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 398543 is about 631.3026215691. The cubic root of 398543 is about 73.5910605675.

Subtracting from 398543 its product of digits (12960), we obtain a palindrome (385583).

Subtracting from 398543 its reverse (345893), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 398543 in words is "three hundred ninety-eight thousand, five hundred forty-three".