928311691 has 2 divisors, whose sum is σ = 928311692. Its totient is φ = 928311690.

The previous prime is 928311661. The next prime is 928311697. The reversal of 928311691 is 196113829.

It is a strong prime.

It is an emirp because it is prime and its reverse (196113829) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 928311691 - 2¹³ = 928303499 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (928311697) 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, 464155845 + 464155846.

It is an arithmetic number, because the mean of its divisors is an integer number (464155846).

Almost surely, 2^928311691 is an apocalyptic number.

928311691 is a deficient number, since it is larger than the sum of its proper divisors (1).

928311691 is an equidigital number, since it uses as much as digits as its factorization.

928311691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 928311691 is about 30468.2078731257. The cubic root of 928311691 is about 975.5089837754.

The spelling of 928311691 in words is "nine hundred twenty-eight million, three hundred eleven thousand, six hundred ninety-one".