1630446997 has 2 divisors, whose sum is σ = 1630446998. Its totient is φ = 1630446996.

The previous prime is 1630446973. The next prime is 1630447037. The reversal of 1630446997 is 7996440361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1325979396 + 304467601 = 36414^2 + 17449^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630446997 - 2⁷ = 1630446869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1630446997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630446947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815223498 + 815223499.

It is an arithmetic number, because the mean of its divisors is an integer number (815223499).

Almost surely, 2^1630446997 is an apocalyptic number.

It is an amenable number.

1630446997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630446997 is an equidigital number, since it uses as much as digits as its factorization.

1630446997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 1630446997 is about 40378.7939022453. The cubic root of 1630446997 is about 1176.9794904351.

The spelling of 1630446997 in words is "one billion, six hundred thirty million, four hundred forty-six thousand, nine hundred ninety-seven".