1630813 has 2 divisors, whose sum is σ = 1630814. Its totient is φ = 1630812.

The previous prime is 1630801. The next prime is 1630829. The reversal of 1630813 is 3180361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994009 + 636804 = 997^2 + 798^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630813 - 2⁵ = 1630781 is a prime.

It is a super-3 number, since 3×1630813³ = 13011691235327333391, which contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815406 + 815407.

It is an arithmetic number, because the mean of its divisors is an integer number (815407).

2^1630813 is an apocalyptic number.

It is an amenable number.

1630813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630813 is an equidigital number, since it uses as much as digits as its factorization.

1630813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1630813 is about 1277.0328891614. The cubic root of 1630813 is about 117.7067553360.

The spelling of 1630813 in words is "one million, six hundred thirty thousand, eight hundred thirteen".