1609493 has 2 divisors, whose sum is σ = 1609494.
Its totient is φ = 1609492.
The previous prime is 1609477. The next prime is 1609501. The reversal of 1609493 is 3949061.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 966289 + 643204 = 983^2 + 802^2
It is an emirp because it is prime and its reverse (3949061) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1609493 - 24 = 1609477 is a prime.
It is a Sophie Germain prime.
It is a Curzon number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1609403) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804746 + 804747.
It is an arithmetic number, because the mean of its divisors is an integer number (804747).
21609493 is an apocalyptic number.
It is an amenable number.
1609493 is a deficient number, since it is larger than the sum of its proper divisors (1).
1609493 is an equidigital number, since it uses as much as digits as its factorization.
1609493 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 5832, while the sum is 32.
The square root of 1609493 is about 1268.6579523260.
The cubic root of 1609493 is about 117.1915677284.
The spelling of 1609493 in words is "one million, six hundred nine thousand, four hundred ninety-three".