1629680447 has 8 divisors (see below), whose sum is σ = 1682727552. Its totient is φ = 1576663200.

The previous prime is 1629680431. The next prime is 1629680449. The reversal of 1629680447 is 7440869261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1629680447 - 2⁴ = 1629680431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1629680449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173393 + ... + 182549.

It is an arithmetic number, because the mean of its divisors is an integer number (210340944).

Almost surely, 2^1629680447 is an apocalyptic number.

1629680447 is a deficient number, since it is larger than the sum of its proper divisors (53047105).

1629680447 is an equidigital number, since it uses as much as digits as its factorization.

1629680447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14929.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 1629680447 is about 40369.3007989982. The cubic root of 1629680447 is about 1176.7950103389.

The spelling of 1629680447 in words is "one billion, six hundred twenty-nine million, six hundred eighty thousand, four hundred forty-seven".