845647729 has 8 divisors (see below), whose sum is σ = 873308160. Its totient is φ = 818011200.

The previous prime is 845647727. The next prime is 845647787. The reversal of 845647729 is 927746548.

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 845647729 - 2¹ = 845647727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845647721) 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, 91344 + ... + 100174.

It is an arithmetic number, because the mean of its divisors is an integer number (109163520).

Almost surely, 2^845647729 is an apocalyptic number.

It is an amenable number.

845647729 is a deficient number, since it is larger than the sum of its proper divisors (27660431).

845647729 is a wasteful number, since it uses less digits than its factorization.

845647729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11951.

The product of its digits is 3386880, while the sum is 52.

The square root of 845647729 is about 29080.0228507476. The cubic root of 845647729 is about 945.6486980518.

The spelling of 845647729 in words is "eight hundred forty-five million, six hundred forty-seven thousand, seven hundred twenty-nine".