1629728873 has 2 divisors, whose sum is σ = 1629728874. Its totient is φ = 1629728872.

The previous prime is 1629728861. The next prime is 1629728879. The reversal of 1629728873 is 3788279261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1558038784 + 71690089 = 39472^2 + 8467^2 .

It is a cyclic number.

It is not a de Polignac number, because 1629728873 - 2¹⁰ = 1629727849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1629728879) 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, 814864436 + 814864437.

It is an arithmetic number, because the mean of its divisors is an integer number (814864437).

Almost surely, 2^1629728873 is an apocalyptic number.

It is an amenable number.

1629728873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1629728873 is an equidigital number, since it uses as much as digits as its factorization.

1629728873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 53.

The square root of 1629728873 is about 40369.9005819930. The cubic root of 1629728873 is about 1176.8066663890.

The spelling of 1629728873 in words is "one billion, six hundred twenty-nine million, seven hundred twenty-eight thousand, eight hundred seventy-three".