1630605139 has 2 divisors, whose sum is σ = 1630605140. Its totient is φ = 1630605138.

The previous prime is 1630605073. The next prime is 1630605173. The reversal of 1630605139 is 9315060361.

It is an a-pointer prime, because the next prime (1630605173) can be obtained adding 1630605139 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1630605139 - 2¹⁵ = 1630572371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1630615139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815302569 + 815302570.

It is an arithmetic number, because the mean of its divisors is an integer number (815302570).

Almost surely, 2^1630605139 is an apocalyptic number.

1630605139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630605139 is an equidigital number, since it uses as much as digits as its factorization.

1630605139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 1630605139 is about 40380.7520856162. The cubic root of 1630605139 is about 1177.0175421418.

The spelling of 1630605139 in words is "one billion, six hundred thirty million, six hundred five thousand, one hundred thirty-nine".