609505993 has 2 divisors, whose sum is σ = 609505994. Its totient is φ = 609505992.

The previous prime is 609505991. The next prime is 609506039. The reversal of 609505993 is 399505906.

It is a happy number.

It is an a-pointer prime, because the next prime (609506039) can be obtained adding 609505993 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609497344 + 8649 = 24688^2 + 93^2 .

It is a cyclic number.

It is not a de Polignac number, because 609505993 - 2¹ = 609505991 is a prime.

Together with 609505991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (609505991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304752996 + 304752997.

It is an arithmetic number, because the mean of its divisors is an integer number (304752997).

Almost surely, 2^609505993 is an apocalyptic number.

It is an amenable number.

609505993 is a deficient number, since it is larger than the sum of its proper divisors (1).

609505993 is an equidigital number, since it uses as much as digits as its factorization.

609505993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 328050, while the sum is 46.

The square root of 609505993 is about 24688.1751654512. The cubic root of 609505993 is about 847.8636051137.

The spelling of 609505993 in words is "six hundred nine million, five hundred five thousand, nine hundred ninety-three".