1634873641 has 2 divisors, whose sum is σ = 1634873642. Its totient is φ = 1634873640.

The previous prime is 1634873587. The next prime is 1634873699. The reversal of 1634873641 is 1463784361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1630463641 + 4410000 = 40379^2 + 2100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1634873641 - 2¹⁵ = 1634840873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1634873441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817436820 + 817436821.

It is an arithmetic number, because the mean of its divisors is an integer number (817436821).

Almost surely, 2^1634873641 is an apocalyptic number.

It is an amenable number.

1634873641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1634873641 is an equidigital number, since it uses as much as digits as its factorization.

1634873641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 1634873641 is about 40433.5707179072. The cubic root of 1634873641 is about 1178.0436896427.

The spelling of 1634873641 in words is "one billion, six hundred thirty-four million, eight hundred seventy-three thousand, six hundred forty-one".