1630633 has 2 divisors, whose sum is σ = 1630634. Its totient is φ = 1630632.

The previous prime is 1630621. The next prime is 1630663. The reversal of 1630633 is 3360361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1373584 + 257049 = 1172^2 + 507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630633 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815316 + 815317.

It is an arithmetic number, because the mean of its divisors is an integer number (815317).

2^1630633 is an apocalyptic number.

It is an amenable number.

1630633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630633 is an equidigital number, since it uses as much as digits as its factorization.

1630633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 1630633 is about 1276.9624113497. The cubic root of 1630633 is about 117.7024245727.

Adding to 1630633 its reverse (3360361), we get a palindrome (4990994).

The spelling of 1630633 in words is "one million, six hundred thirty thousand, six hundred thirty-three".