911689 has 2 divisors, whose sum is σ = 911690. Its totient is φ = 911688.

The previous prime is 911683. The next prime is 911707. The reversal of 911689 is 986119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751689 + 160000 = 867^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 911689 - 2³ = 911681 is a prime.

It is not a weakly prime, because it can be changed into another prime (911681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455844 + 455845.

It is an arithmetic number, because the mean of its divisors is an integer number (455845).

2⁹¹¹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

911689 is a deficient number, since it is larger than the sum of its proper divisors (1).

911689 is an equidigital number, since it uses as much as digits as its factorization.

911689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 34.

The square root of 911689 is about 954.8240675643. The cubic root of 911689 is about 96.9651272241.

It can be divided in two parts, 911 and 689, that added together give a square (1600 = 40²).

The spelling of 911689 in words is "nine hundred eleven thousand, six hundred eighty-nine".