1630790009 has 2 divisors, whose sum is σ = 1630790010. Its totient is φ = 1630790008.

The previous prime is 1630790003. The next prime is 1630790017. The reversal of 1630790009 is 9000970361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1188318784 + 442471225 = 34472^2 + 21035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630790009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1630790003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815395004 + 815395005.

It is an arithmetic number, because the mean of its divisors is an integer number (815395005).

Almost surely, 2^1630790009 is an apocalyptic number.

It is an amenable number.

1630790009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630790009 is an equidigital number, since it uses as much as digits as its factorization.

1630790009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 1630790009 is about 40383.0411063852. The cubic root of 1630790009 is about 1177.0620219498.

The spelling of 1630790009 in words is "one billion, six hundred thirty million, seven hundred ninety thousand, nine".