928974821 has 2 divisors, whose sum is σ = 928974822. Its totient is φ = 928974820.

The previous prime is 928974817. The next prime is 928974829. The reversal of 928974821 is 128479829.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 733813921 + 195160900 = 27089^2 + 13970^2 .

It is a cyclic number.

It is not a de Polignac number, because 928974821 - 2² = 928974817 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 928974821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (928974829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464487410 + 464487411.

It is an arithmetic number, because the mean of its divisors is an integer number (464487411).

Almost surely, 2^928974821 is an apocalyptic number.

It is an amenable number.

928974821 is a deficient number, since it is larger than the sum of its proper divisors (1).

928974821 is an equidigital number, since it uses as much as digits as its factorization.

928974821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 928974821 is about 30479.0882573610. The cubic root of 928974821 is about 975.7412101231.

The spelling of 928974821 in words is "nine hundred twenty-eight million, nine hundred seventy-four thousand, eight hundred twenty-one".