611543 has 2 divisors, whose sum is σ = 611544. Its totient is φ = 611542.

The previous prime is 611531. The next prime is 611549. The reversal of 611543 is 345116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 611543 - 2¹⁴ = 595159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611549) 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, 305771 + 305772.

It is an arithmetic number, because the mean of its divisors is an integer number (305772).

2⁶¹¹⁵⁴³ is an apocalyptic number.

611543 is a deficient number, since it is larger than the sum of its proper divisors (1).

611543 is an equidigital number, since it uses as much as digits as its factorization.

611543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 611543 is about 782.0121482432. The cubic root of 611543 is about 84.8807092491.

Adding to 611543 its reverse (345116), we get a palindrome (956659).

The spelling of 611543 in words is "six hundred eleven thousand, five hundred forty-three".