1630280947 has 2 divisors, whose sum is σ = 1630280948. Its totient is φ = 1630280946.

The previous prime is 1630280923. The next prime is 1630281017. The reversal of 1630280947 is 7490820361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1630280947 - 2⁷ = 1630280819 is a prime.

It is not a weakly prime, because it can be changed into another prime (1630280147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815140473 + 815140474.

It is an arithmetic number, because the mean of its divisors is an integer number (815140474).

Almost surely, 2^1630280947 is an apocalyptic number.

1630280947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630280947 is an equidigital number, since it uses as much as digits as its factorization.

1630280947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1630280947 is about 40376.7376963518. The cubic root of 1630280947 is about 1176.9395332782.

The spelling of 1630280947 in words is "one billion, six hundred thirty million, two hundred eighty thousand, nine hundred forty-seven".