920811 has 8 divisors (see below), whose sum is σ = 1234944. Its totient is φ = 610280.

The previous prime is 920807. The next prime is 920827. The reversal of 920811 is 118029.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 920811 - 2² = 920807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (920891) 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 in 7 ways as a sum of consecutive naturals, for example, 231 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (154368).

2⁹²⁰⁸¹¹ is an apocalyptic number.

920811 is a deficient number, since it is larger than the sum of its proper divisors (314133).

920811 is a wasteful number, since it uses less digits than its factorization.

920811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 920811 is about 959.5889745094. The cubic root of 920811 is about 97.2874528349.

The spelling of 920811 in words is "nine hundred twenty thousand, eight hundred eleven".