1609913 has 2 divisors, whose sum is σ = 1609914. Its totient is φ = 1609912.

The previous prime is 1609903. The next prime is 1609969. The reversal of 1609913 is 3199061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1605289 + 4624 = 1267^2 + 68^2 .

It is an emirp because it is prime and its reverse (3199061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1609913 - 2⁴ = 1609897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1609903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804956 + 804957.

It is an arithmetic number, because the mean of its divisors is an integer number (804957).

2^1609913 is an apocalyptic number.

It is an amenable number.

1609913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609913 is an equidigital number, since it uses as much as digits as its factorization.

1609913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1609913 is about 1268.8234707791. The cubic root of 1609913 is about 117.2017606231.

The spelling of 1609913 in words is "one million, six hundred nine thousand, nine hundred thirteen".