3509398609 has 2 divisors, whose sum is σ = 3509398610. Its totient is φ = 3509398608.

The previous prime is 3509398601. The next prime is 3509398619. The reversal of 3509398609 is 9068939053.

It is a happy number.

3509398609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2450547009 + 1058851600 = 49503^2 + 32540^2 .

It is an emirp because it is prime and its reverse (9068939053) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3509398609 - 2³ = 3509398601 is a prime.

It is a super-2 number, since 2×3509398609² = 24631757193702269762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3509398601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1754699304 + 1754699305.

It is an arithmetic number, because the mean of its divisors is an integer number (1754699305).

Almost surely, 2^3509398609 is an apocalyptic number.

It is an amenable number.

3509398609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3509398609 is an equidigital number, since it uses as much as digits as its factorization.

3509398609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The square root of 3509398609 is about 59240.1773208015. The cubic root of 3509398609 is about 1519.6523051962.

The spelling of 3509398609 in words is "three billion, five hundred nine million, three hundred ninety-eight thousand, six hundred nine".