729805853 has 6 divisors (see below), whose sum is σ = 848957886. Its totient is φ = 625547832.

The previous prime is 729805841. The next prime is 729805883. The reversal of 729805853 is 358508927.

It can be written as a sum of positive squares in only one way, i.e., 729702169 + 103684 = 27013^2 + 322^2 .

It is not a de Polignac number, because 729805853 - 2¹⁴ = 729789469 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 729805798 and 729805807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729805823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7446950 + ... + 7447047.

It is an arithmetic number, because the mean of its divisors is an integer number (141492981).

Almost surely, 2^729805853 is an apocalyptic number.

It is an amenable number.

729805853 is a deficient number, since it is larger than the sum of its proper divisors (119152033).

729805853 is a wasteful number, since it uses less digits than its factorization.

729805853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14894011 (or 14894004 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 729805853 is about 27014.9190818703. The cubic root of 729805853 is about 900.3315046281.

The spelling of 729805853 in words is "seven hundred twenty-nine million, eight hundred five thousand, eight hundred fifty-three".