920889 has 10 divisors (see below), whose sum is σ = 1375770. Its totient is φ = 613872.

The previous prime is 920869. The next prime is 920891. The reversal of 920889 is 988029.

920889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 810000 + 110889 = 900^2 + 333^2 .

It is not a de Polignac number, because 920889 - 2⁷ = 920761 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920849) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5604 + ... + 5765.

It is an arithmetic number, because the mean of its divisors is an integer number (137577).

2⁹²⁰⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

920889 is a deficient number, since it is larger than the sum of its proper divisors (454881).

920889 is a wasteful number, since it uses less digits than its factorization.

920889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11381 (or 11372 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 920889 is about 959.6296160499. The cubic root of 920889 is about 97.2901997638.

The spelling of 920889 in words is "nine hundred twenty thousand, eight hundred eighty-nine".