609688613 has 2 divisors, whose sum is σ = 609688614. Its totient is φ = 609688612.

The previous prime is 609688603. The next prime is 609688633. The reversal of 609688613 is 316886906.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 392951329 + 216737284 = 19823^2 + 14722^2 .

It is a cyclic number.

It is not a de Polignac number, because 609688613 - 2¹⁴ = 609672229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609688603) 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, 304844306 + 304844307.

It is an arithmetic number, because the mean of its divisors is an integer number (304844307).

Almost surely, 2^609688613 is an apocalyptic number.

It is an amenable number.

609688613 is a deficient number, since it is larger than the sum of its proper divisors (1).

609688613 is an equidigital number, since it uses as much as digits as its factorization.

609688613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 609688613 is about 24691.8734202166. The cubic root of 609688613 is about 847.9482755363.

The spelling of 609688613 in words is "six hundred nine million, six hundred eighty-eight thousand, six hundred thirteen".