609459989 has 2 divisors, whose sum is σ = 609459990. Its totient is φ = 609459988.

The previous prime is 609459973. The next prime is 609459997. The reversal of 609459989 is 989954906.

609459989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319336900 + 290123089 = 17870^2 + 17033^2 .

It is a cyclic number.

It is not a de Polignac number, because 609459989 - 2⁴ = 609459973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609459689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304729994 + 304729995.

It is an arithmetic number, because the mean of its divisors is an integer number (304729995).

Almost surely, 2^609459989 is an apocalyptic number.

It is an amenable number.

609459989 is a deficient number, since it is larger than the sum of its proper divisors (1).

609459989 is an equidigital number, since it uses as much as digits as its factorization.

609459989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 59.

The square root of 609459989 is about 24687.2434467682. The cubic root of 609459989 is about 847.8422730300.

The spelling of 609459989 in words is "six hundred nine million, four hundred fifty-nine thousand, nine hundred eighty-nine".