1608994 has 4 divisors (see below), whose sum is σ = 2413494. Its totient is φ = 804496.

The previous prime is 1608979. The next prime is 1609009. The reversal of 1608994 is 4998061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4998061 = 23 ⋅217307.

It is an interprime number because it is at equal distance from previous prime (1608979) and next prime (1609009).

It can be written as a sum of positive squares in only one way, i.e., 877969 + 731025 = 937^2 + 855^2 .

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402247 + ... + 402250.

2^1608994 is an apocalyptic number.

1608994 is a deficient number, since it is larger than the sum of its proper divisors (804500).

1608994 is an equidigital number, since it uses as much as digits as its factorization.

1608994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804499.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1608994 is about 1268.4612725661. The cubic root of 1608994 is about 117.1794552937.

The spelling of 1608994 in words is "one million, six hundred eight thousand, nine hundred ninety-four".