729871 has 2 divisors, whose sum is σ = 729872. Its totient is φ = 729870.

The previous prime is 729851. The next prime is 729877. The reversal of 729871 is 178927.

729871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 729871 - 2⁹ = 729359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364935 + 364936.

It is an arithmetic number, because the mean of its divisors is an integer number (364936).

2⁷²⁹⁸⁷¹ is an apocalyptic number.

729871 is a deficient number, since it is larger than the sum of its proper divisors (1).

729871 is an equidigital number, since it uses as much as digits as its factorization.

729871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 34.

The square root of 729871 is about 854.3248796564. The cubic root of 729871 is about 90.0358293557.

It can be divided in two parts, 729 and 871, that added together give a square (1600 = 40²).

The spelling of 729871 in words is "seven hundred twenty-nine thousand, eight hundred seventy-one".