928715989 has 2 divisors, whose sum is σ = 928715990. Its totient is φ = 928715988.

The previous prime is 928715951. The next prime is 928716049. The reversal of 928715989 is 989517829.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 896703025 + 32012964 = 29945^2 + 5658^2 .

It is an emirp because it is prime and its reverse (989517829) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 928715989 - 2¹³ = 928707797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (928715929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464357994 + 464357995.

It is an arithmetic number, because the mean of its divisors is an integer number (464357995).

Almost surely, 2^928715989 is an apocalyptic number.

It is an amenable number.

928715989 is a deficient number, since it is larger than the sum of its proper divisors (1).

928715989 is an equidigital number, since it uses as much as digits as its factorization.

928715989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 58.

The square root of 928715989 is about 30474.8419027893. The cubic root of 928715989 is about 975.6505810044.

The spelling of 928715989 in words is "nine hundred twenty-eight million, seven hundred fifteen thousand, nine hundred eighty-nine".