928561 has 2 divisors, whose sum is σ = 928562. Its totient is φ = 928560.

The previous prime is 928559. The next prime is 928597. The reversal of 928561 is 165829.

928561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712336 + 216225 = 844^2 + 465^2 .

It is an emirp because it is prime and its reverse (165829) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 928561 - 2¹ = 928559 is a prime.

Together with 928559, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (928661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464280 + 464281.

It is an arithmetic number, because the mean of its divisors is an integer number (464281).

2⁹²⁸⁵⁶¹ is an apocalyptic number.

It is an amenable number.

928561 is a deficient number, since it is larger than the sum of its proper divisors (1).

928561 is an equidigital number, since it uses as much as digits as its factorization.

928561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 928561 is about 963.6187005242. The cubic root of 928561 is about 97.5596304088.

It can be divided in two parts, 9 and 28561, that multiplied together give a square (257049 = 507²).

The spelling of 928561 in words is "nine hundred twenty-eight thousand, five hundred sixty-one".