1606369 has 4 divisors (see below), whose sum is σ = 1617300. Its totient is φ = 1595440.

The previous prime is 1606349. The next prime is 1606379. The reversal of 1606369 is 9636061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 313600 + 1292769 = 560^2 + 1137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606369 - 2¹⁷ = 1475297 is a prime.

It is a super-2 number, since 2×1606369² = 5160842728322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1606369.

It is not an unprimeable number, because it can be changed into a prime (1606309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5242 + ... + 5539.

It is an arithmetic number, because the mean of its divisors is an integer number (404325).

2^1606369 is an apocalyptic number.

It is an amenable number.

1606369 is a deficient number, since it is larger than the sum of its proper divisors (10931).

1606369 is a wasteful number, since it uses less digits than its factorization.

1606369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10930.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1606369 is about 1267.4261319698. The cubic root of 1606369 is about 117.1156963034.

The spelling of 1606369 in words is "one million, six hundred six thousand, three hundred sixty-nine".