1663117 has 2 divisors, whose sum is σ = 1663118. Its totient is φ = 1663116.

The previous prime is 1663099. The next prime is 1663133. The reversal of 1663117 is 7113661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1572516 + 90601 = 1254^2 + 301^2 .

It is an emirp because it is prime and its reverse (7113661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1663117 - 2¹¹ = 1661069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1663091 and 1663100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831558 + 831559.

It is an arithmetic number, because the mean of its divisors is an integer number (831559).

2^1663117 is an apocalyptic number.

It is an amenable number.

1663117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663117 is an equidigital number, since it uses as much as digits as its factorization.

1663117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 1663117 is about 1289.6189359652. The cubic root of 1663117 is about 118.4788784184.

Adding to 1663117 its reverse (7113661), we get a palindrome (8776778).

The spelling of 1663117 in words is "one million, six hundred sixty-three thousand, one hundred seventeen".