609851089 has 2 divisors, whose sum is σ = 609851090. Its totient is φ = 609851088.

The previous prime is 609851087. The next prime is 609851093. The reversal of 609851089 is 980158906.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601966225 + 7884864 = 24535^2 + 2808^2 .

It is a cyclic number.

It is not a de Polignac number, because 609851089 - 2¹ = 609851087 is a prime.

Together with 609851087, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (609851087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304925544 + 304925545.

It is an arithmetic number, because the mean of its divisors is an integer number (304925545).

Almost surely, 2^609851089 is an apocalyptic number.

It is an amenable number.

609851089 is a deficient number, since it is larger than the sum of its proper divisors (1).

609851089 is an equidigital number, since it uses as much as digits as its factorization.

609851089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 609851089 is about 24695.1632713777. The cubic root of 609851089 is about 848.0235921295.

The spelling of 609851089 in words is "six hundred nine million, eight hundred fifty-one thousand, eighty-nine".