1629945871 has 2 divisors, whose sum is σ = 1629945872. Its totient is φ = 1629945870.

The previous prime is 1629945833. The next prime is 1629945883. The reversal of 1629945871 is 1785499261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1629945871 - 2¹⁹ = 1629421583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1629945271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814972935 + 814972936.

It is an arithmetic number, because the mean of its divisors is an integer number (814972936).

Almost surely, 2^1629945871 is an apocalyptic number.

1629945871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1629945871 is an equidigital number, since it uses as much as digits as its factorization.

1629945871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 52.

The square root of 1629945871 is about 40372.5881137189. The cubic root of 1629945871 is about 1176.8588945774.

The spelling of 1629945871 in words is "one billion, six hundred twenty-nine million, nine hundred forty-five thousand, eight hundred seventy-one".