1609418 has 4 divisors (see below), whose sum is σ = 2414130. Its totient is φ = 804708.

The previous prime is 1609417. The next prime is 1609423. The reversal of 1609418 is 8149061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8149061 = 23 ⋅354307.

It can be written as a sum of positive squares in only one way, i.e., 822649 + 786769 = 907^2 + 887^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1609417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402353 + ... + 402356.

2^1609418 is an apocalyptic number.

1609418 is a deficient number, since it is larger than the sum of its proper divisors (804712).

1609418 is an equidigital number, since it uses as much as digits as its factorization.

1609418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804711.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1609418 is about 1268.6283931869. The cubic root of 1609418 is about 117.1897473821.

The spelling of 1609418 in words is "one million, six hundred nine thousand, four hundred eighteen".