1609513 has 4 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 1606228.

The previous prime is 1609511. The next prime is 1609519. The reversal of 1609513 is 3159061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1609513 - 2¹ = 1609511 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1609511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745 + ... + 1942.

It is an arithmetic number, because the mean of its divisors is an integer number (403200).

2^1609513 is an apocalyptic number.

It is an amenable number.

1609513 is a deficient number, since it is larger than the sum of its proper divisors (3287).

1609513 is an equidigital number, since it uses as much as digits as its factorization.

1609513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 1609513 is about 1268.6658346468. The cubic root of 1609513 is about 117.1920531446.

The spelling of 1609513 in words is "one million, six hundred nine thousand, five hundred thirteen".