1664833 has 2 divisors, whose sum is σ = 1664834. Its totient is φ = 1664832.

The previous prime is 1664821. The next prime is 1664849. The reversal of 1664833 is 3384661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1656369 + 8464 = 1287^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664833 - 2⁵ = 1664801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1664795 and 1664804.

It is not a weakly prime, because it can be changed into another prime (1664863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832416 + 832417.

It is an arithmetic number, because the mean of its divisors is an integer number (832417).

2^1664833 is an apocalyptic number.

It is an amenable number.

1664833 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664833 is an equidigital number, since it uses as much as digits as its factorization.

1664833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 1664833 is about 1290.2840772481. The cubic root of 1664833 is about 118.5196131494.

The spelling of 1664833 in words is "one million, six hundred sixty-four thousand, eight hundred thirty-three".