928729 has 4 divisors (see below), whose sum is σ = 958720. Its totient is φ = 898740.

The previous prime is 928703. The next prime is 928769. The reversal of 928729 is 927829.

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, and also an emirpimes, since its reverse is a distinct semiprime: 927829 = 7 ⋅132547.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-928729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (928769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14949 + ... + 15010.

It is an arithmetic number, because the mean of its divisors is an integer number (239680).

2⁹²⁸⁷²⁹ is an apocalyptic number.

It is an amenable number.

928729 is a deficient number, since it is larger than the sum of its proper divisors (29991).

928729 is a wasteful number, since it uses less digits than its factorization.

928729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29990.

The product of its digits is 18144, while the sum is 37.

The square root of 928729 is about 963.7058679909. The cubic root of 928729 is about 97.5655137162.

Subtracting from 928729 its reverse (927829), we obtain a square (900 = 30²).

It can be divided in two parts, 9287 and 29, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 928729 in words is "nine hundred twenty-eight thousand, seven hundred twenty-nine".