1663301 has 2 divisors, whose sum is σ = 1663302. Its totient is φ = 1663300.

The previous prime is 1663289. The next prime is 1663303. The reversal of 1663301 is 1033661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1442401 + 220900 = 1201^2 + 470^2 .

It is an emirp because it is prime and its reverse (1033661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1663301 is a prime.

Together with 1663303, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831650 + 831651.

It is an arithmetic number, because the mean of its divisors is an integer number (831651).

2^1663301 is an apocalyptic number.

It is an amenable number.

1663301 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663301 is an equidigital number, since it uses as much as digits as its factorization.

1663301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1663301 is about 1289.6902728950. The cubic root of 1663301 is about 118.4832475858.

Adding to 1663301 its reverse (1033661), we get a palindrome (2696962).

The spelling of 1663301 in words is "one million, six hundred sixty-three thousand, three hundred one".