1609412617 has 4 divisors (see below), whose sum is σ = 1610385556. Its totient is φ = 1608439680.

The previous prime is 1609412591. The next prime is 1609412641. The reversal of 1609412617 is 7162149061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7162149061 = 14083 ⋅508567.

It can be written as a sum of positive squares in 2 ways, for example, as 1181915641 + 427496976 = 34379^2 + 20676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1609412617 - 2⁷ = 1609412489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1609415617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483984 + ... + 487297.

It is an arithmetic number, because the mean of its divisors is an integer number (402596389).

Almost surely, 2^1609412617 is an apocalyptic number.

It is an amenable number.

1609412617 is a deficient number, since it is larger than the sum of its proper divisors (972939).

1609412617 is an equidigital number, since it uses as much as digits as its factorization.

1609412617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972938.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1609412617 is about 40117.4851779121. The cubic root of 1609412617 is about 1171.8961672759.

The spelling of 1609412617 in words is "one billion, six hundred nine million, four hundred twelve thousand, six hundred seventeen".