613504643 has 2 divisors, whose sum is σ = 613504644. Its totient is φ = 613504642.

The previous prime is 613504621. The next prime is 613504649. The reversal of 613504643 is 346405316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 613504643 - 2⁶ = 613504579 is a prime.

It is not a weakly prime, because it can be changed into another prime (613504649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306752321 + 306752322.

It is an arithmetic number, because the mean of its divisors is an integer number (306752322).

Almost surely, 2^613504643 is an apocalyptic number.

613504643 is a deficient number, since it is larger than the sum of its proper divisors (1).

613504643 is an equidigital number, since it uses as much as digits as its factorization.

613504643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 613504643 is about 24769.0258791096. The cubic root of 613504643 is about 849.7136950397.

Adding to 613504643 its reverse (346405316), we get a palindrome (959909959).

The spelling of 613504643 in words is "six hundred thirteen million, five hundred four thousand, six hundred forty-three".