1630797109 has 2 divisors, whose sum is σ = 1630797110. Its totient is φ = 1630797108.

The previous prime is 1630797073. The next prime is 1630797137. The reversal of 1630797109 is 9017970361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1609774884 + 21022225 = 40122^2 + 4585^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630797109 - 2⁹ = 1630796597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630797139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815398554 + 815398555.

It is an arithmetic number, because the mean of its divisors is an integer number (815398555).

Almost surely, 2^1630797109 is an apocalyptic number.

It is an amenable number.

1630797109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630797109 is an equidigital number, since it uses as much as digits as its factorization.

1630797109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 1630797109 is about 40383.1290144783. The cubic root of 1630797109 is about 1177.0637301460.

The spelling of 1630797109 in words is "one billion, six hundred thirty million, seven hundred ninety-seven thousand, one hundred nine".