1630790509 has 2 divisors, whose sum is σ = 1630790510. Its totient is φ = 1630790508.

The previous prime is 1630790479. The next prime is 1630790527. The reversal of 1630790509 is 9050970361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1474790409 + 156000100 = 38403^2 + 12490^2 .

It is an emirp because it is prime and its reverse (9050970361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1630790509 - 2⁵ = 1630790477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630790009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815395254 + 815395255.

It is an arithmetic number, because the mean of its divisors is an integer number (815395255).

Almost surely, 2^1630790509 is an apocalyptic number.

It is an amenable number.

1630790509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630790509 is an equidigital number, since it uses as much as digits as its factorization.

1630790509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 1630790509 is about 40383.0472971023. The cubic root of 1630790509 is about 1177.0621422455.

The spelling of 1630790509 in words is "one billion, six hundred thirty million, seven hundred ninety thousand, five hundred nine".