928921 has 8 divisors (see below), whose sum is σ = 1070784. Its totient is φ = 789360.

The previous prime is 928913. The next prime is 928927. The reversal of 928921 is 129829.

928921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 928921 - 2³ = 928913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (928927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411 + ... + 1423.

It is an arithmetic number, because the mean of its divisors is an integer number (133848).

2⁹²⁸⁹²¹ is an apocalyptic number.

It is an amenable number.

928921 is a deficient number, since it is larger than the sum of its proper divisors (141863).

928921 is a wasteful number, since it uses less digits than its factorization.

928921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151.

The product of its digits is 2592, while the sum is 31.

The square root of 928921 is about 963.8054782994. The cubic root of 928921 is about 97.5722366275.

It can be divided in two parts, 928 and 921, that added together give a square (1849 = 43²).

The spelling of 928921 in words is "nine hundred twenty-eight thousand, nine hundred twenty-one".