1663133 has 2 divisors, whose sum is σ = 1663134. Its totient is φ = 1663132.

The previous prime is 1663117. The next prime is 1663147. The reversal of 1663133 is 3313661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994009 + 669124 = 997^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 1663133 - 2⁴ = 1663117 is a prime.

It is a super-2 number, since 2×1663133² = 5532022751378, which contains 22 as substring.

It is an Ulam number.

It is equal to p₁₂₅₅₅₅ and since 1663133 and 125555 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1663099 and 1663108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831566 + 831567.

It is an arithmetic number, because the mean of its divisors is an integer number (831567).

2^1663133 is an apocalyptic number.

It is an amenable number.

1663133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663133 is an equidigital number, since it uses as much as digits as its factorization.

1663133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 23.

The square root of 1663133 is about 1289.6251393331. The cubic root of 1663133 is about 118.4792583588.

Adding to 1663133 its reverse (3313661), we get a palindrome (4976794).

The spelling of 1663133 in words is "one million, six hundred sixty-three thousand, one hundred thirty-three".