928409 has 2 divisors, whose sum is σ = 928410. Its totient is φ = 928408.

The previous prime is 928399. The next prime is 928423. The reversal of 928409 is 904829.

928409 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., 912025 + 16384 = 955^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 928409 - 2⁸ = 928153 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (928429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464204 + 464205.

It is an arithmetic number, because the mean of its divisors is an integer number (464205).

2⁹²⁸⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

928409 is a deficient number, since it is larger than the sum of its proper divisors (1).

928409 is an equidigital number, since it uses as much as digits as its factorization.

928409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 928409 is about 963.5398279262. The cubic root of 928409 is about 97.5543068048.

The spelling of 928409 in words is "nine hundred twenty-eight thousand, four hundred nine".