1331633 has 2 divisors, whose sum is σ = 1331634. Its totient is φ = 1331632.

The previous prime is 1331611. The next prime is 1331641. The reversal of 1331633 is 3361331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1270129 + 61504 = 1127^2 + 248^2 .

It is an emirp because it is prime and its reverse (3361331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331633 - 2⁸ = 1331377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1331663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665816 + 665817.

It is an arithmetic number, because the mean of its divisors is an integer number (665817).

2^1331633 is an apocalyptic number.

It is an amenable number.

1331633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331633 is an equidigital number, since it uses as much as digits as its factorization.

1331633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 20.

The square root of 1331633 is about 1153.9640375679. The cubic root of 1331633 is about 110.0174352529.

Adding to 1331633 its reverse (3361331), we get a palindrome (4692964).

The spelling of 1331633 in words is "one million, three hundred thirty-one thousand, six hundred thirty-three".