1606994 has 4 divisors (see below), whose sum is σ = 2410494. Its totient is φ = 803496.

The previous prime is 1606991. The next prime is 1607003. The reversal of 1606994 is 4996061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1408969 + 198025 = 1187^2 + 445^2 .

It is not an unprimeable number, because it can be changed into a prime (1606991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401747 + ... + 401750.

2^1606994 is an apocalyptic number.

1606994 is a deficient number, since it is larger than the sum of its proper divisors (803500).

1606994 is an equidigital number, since it uses as much as digits as its factorization.

1606994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803499.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1606994 is about 1267.6726706844. The cubic root of 1606994 is about 117.1308833120.

The spelling of 1606994 in words is "one million, six hundred six thousand, nine hundred ninety-four".