1630047649 has 2 divisors, whose sum is σ = 1630047650. Its totient is φ = 1630047648.

The previous prime is 1630047647. The next prime is 1630047739. The reversal of 1630047649 is 9467400361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 819791424 + 810256225 = 28632^2 + 28465^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630047649 - 2¹ = 1630047647 is a prime.

Together with 1630047647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1630047641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815023824 + 815023825.

It is an arithmetic number, because the mean of its divisors is an integer number (815023825).

Almost surely, 2^1630047649 is an apocalyptic number.

It is an amenable number.

1630047649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630047649 is an equidigital number, since it uses as much as digits as its factorization.

1630047649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 1630047649 is about 40373.8485780090. The cubic root of 1630047649 is about 1176.8833894300.

The spelling of 1630047649 in words is "one billion, six hundred thirty million, forty-seven thousand, six hundred forty-nine".