840911 has 2 divisors, whose sum is σ = 840912. Its totient is φ = 840910.

The previous prime is 840907. The next prime is 840923. The reversal of 840911 is 119048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 840911 - 2² = 840907 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420455 + 420456.

It is an arithmetic number, because the mean of its divisors is an integer number (420456).

2⁸⁴⁰⁹¹¹ is an apocalyptic number.

840911 is a deficient number, since it is larger than the sum of its proper divisors (1).

840911 is an equidigital number, since it uses as much as digits as its factorization.

840911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 840911 is about 917.0119955595. The cubic root of 840911 is about 94.3879769592.

Adding to 840911 its reverse (119048), we get a palindrome (959959).

The spelling of 840911 in words is "eight hundred forty thousand, nine hundred eleven".