1629227809 has 4 divisors (see below), whose sum is σ = 1777339440. Its totient is φ = 1481116180.

The previous prime is 1629227773. The next prime is 1629227813. The reversal of 1629227809 is 9087229261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1629227809 - 2⁹ = 1629227297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1629227309) 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 in 3 ways as a sum of consecutive naturals, for example, 74055799 + ... + 74055820.

It is an arithmetic number, because the mean of its divisors is an integer number (444334860).

Almost surely, 2^1629227809 is an apocalyptic number.

It is an amenable number.

1629227809 is a deficient number, since it is larger than the sum of its proper divisors (148111631).

1629227809 is a wasteful number, since it uses less digits than its factorization.

1629227809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148111630.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1629227809 is about 40363.6941941641. The cubic root of 1629227809 is about 1176.6860500284.

The spelling of 1629227809 in words is "one billion, six hundred twenty-nine million, two hundred twenty-seven thousand, eight hundred nine".