613497839 has 2 divisors, whose sum is σ = 613497840. Its totient is φ = 613497838.

The previous prime is 613497827. The next prime is 613497877. The reversal of 613497839 is 938794316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 613497839 - 2⁸ = 613497583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613497739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306748919 + 306748920.

It is an arithmetic number, because the mean of its divisors is an integer number (306748920).

Almost surely, 2^613497839 is an apocalyptic number.

613497839 is a deficient number, since it is larger than the sum of its proper divisors (1).

613497839 is an equidigital number, since it uses as much as digits as its factorization.

613497839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 613497839 is about 24768.8885297665. Note that the first 3 decimals coincide. The cubic root of 613497839 is about 849.7105538120.

The spelling of 613497839 in words is "six hundred thirteen million, four hundred ninety-seven thousand, eight hundred thirty-nine".