1630447409 has 2 divisors, whose sum is σ = 1630447410. Its totient is φ = 1630447408.

The previous prime is 1630447349. The next prime is 1630447453. The reversal of 1630447409 is 9047440361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1478171809 + 152275600 = 38447^2 + 12340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630447409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1630447459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815223704 + 815223705.

It is an arithmetic number, because the mean of its divisors is an integer number (815223705).

Almost surely, 2^1630447409 is an apocalyptic number.

It is an amenable number.

1630447409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630447409 is an equidigital number, since it uses as much as digits as its factorization.

1630447409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 1630447409 is about 40378.7990039327. The cubic root of 1630447409 is about 1176.9795895726.

The spelling of 1630447409 in words is "one billion, six hundred thirty million, four hundred forty-seven thousand, four hundred nine".