613609873 has 2 divisors, whose sum is σ = 613609874. Its totient is φ = 613609872.

The previous prime is 613609783. The next prime is 613609879. The reversal of 613609873 is 378906316.

Together with previous prime (613609783) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431683729 + 181926144 = 20777^2 + 13488^2 .

It is a cyclic number.

It is not a de Polignac number, because 613609873 - 2⁹ = 613609361 is a prime.

It is a super-2 number, since 2×613609873² = 753034152486152258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (613609879) 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, 306804936 + 306804937.

It is an arithmetic number, because the mean of its divisors is an integer number (306804937).

Almost surely, 2^613609873 is an apocalyptic number.

It is an amenable number.

613609873 is a deficient number, since it is larger than the sum of its proper divisors (1).

613609873 is an equidigital number, since it uses as much as digits as its factorization.

613609873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 613609873 is about 24771.1500136752. The cubic root of 613609873 is about 849.7622740040.

The spelling of 613609873 in words is "six hundred thirteen million, six hundred nine thousand, eight hundred seventy-three".