928649789 has 2 divisors, whose sum is σ = 928649790. Its totient is φ = 928649788.

The previous prime is 928649779. The next prime is 928649797. The reversal of 928649789 is 987946829.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 733488889 + 195160900 = 27083^2 + 13970^2 .

It is an emirp because it is prime and its reverse (987946829) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-928649789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (928649779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464324894 + 464324895.

It is an arithmetic number, because the mean of its divisors is an integer number (464324895).

Almost surely, 2^928649789 is an apocalyptic number.

It is an amenable number.

928649789 is a deficient number, since it is larger than the sum of its proper divisors (1).

928649789 is an equidigital number, since it uses as much as digits as its factorization.

928649789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 62.

The square root of 928649789 is about 30473.7557416213. The cubic root of 928649789 is about 975.6273986020.

The spelling of 928649789 in words is "nine hundred twenty-eight million, six hundred forty-nine thousand, seven hundred eighty-nine".