613243 has 2 divisors, whose sum is σ = 613244. Its totient is φ = 613242.

The previous prime is 613231. The next prime is 613247. The reversal of 613243 is 342316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 613243 - 2¹³ = 605051 is a prime.

613243 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 613243.

It is not a weakly prime, because it can be changed into another prime (613247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306621 + 306622.

It is an arithmetic number, because the mean of its divisors is an integer number (306622).

2⁶¹³²⁴³ is an apocalyptic number.

613243 is a deficient number, since it is larger than the sum of its proper divisors (1).

613243 is an equidigital number, since it uses as much as digits as its factorization.

613243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 613243 is about 783.0983335444. The cubic root of 613243 is about 84.9592884624.

Adding to 613243 its reverse (342316), we get a palindrome (955559).

The spelling of 613243 in words is "six hundred thirteen thousand, two hundred forty-three".