1663341 has 4 divisors (see below), whose sum is σ = 2217792. Its totient is φ = 1108892.

The previous prime is 1663327. The next prime is 1663349. The reversal of 1663341 is 1433661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1663341 - 2⁵ = 1663309 is a prime.

It is a D-number.

1663341 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277221 + ... + 277226.

It is an arithmetic number, because the mean of its divisors is an integer number (554448).

2^1663341 is an apocalyptic number.

It is an amenable number.

1663341 is a deficient number, since it is larger than the sum of its proper divisors (554451).

1663341 is an equidigital number, since it uses as much as digits as its factorization.

1663341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554450.

The product of its digits is 1296, while the sum is 24.

The square root of 1663341 is about 1289.7057804011. The cubic root of 1663341 is about 118.4841973622.

The spelling of 1663341 in words is "one million, six hundred sixty-three thousand, three hundred forty-one".