1646633 has 2 divisors, whose sum is σ = 1646634. Its totient is φ = 1646632.

The previous prime is 1646629. The next prime is 1646641. The reversal of 1646633 is 3366461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1607824 + 38809 = 1268^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1646633 - 2² = 1646629 is a prime.

It is a super-2 number, since 2×1646633² = 5422800473378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1646596 and 1646605.

It is not a weakly prime, because it can be changed into another prime (1646033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 823316 + 823317.

It is an arithmetic number, because the mean of its divisors is an integer number (823317).

2^1646633 is an apocalyptic number.

It is an amenable number.

1646633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1646633 is an equidigital number, since it uses as much as digits as its factorization.

1646633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 29.

The square root of 1646633 is about 1283.2119856049. The cubic root of 1646633 is about 118.0861431689.

The spelling of 1646633 in words is "one million, six hundred forty-six thousand, six hundred thirty-three".