920789 has 2 divisors, whose sum is σ = 920790. Its totient is φ = 920788.

The previous prime is 920783. The next prime is 920791. The reversal of 920789 is 987029.

920789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917764 + 3025 = 958^2 + 55^2 .

It is an emirp because it is prime and its reverse (987029) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920789 is a prime.

It is a Sophie Germain prime.

Together with 920791, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (920783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460394 + 460395.

It is an arithmetic number, because the mean of its divisors is an integer number (460395).

2⁹²⁰⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

920789 is a deficient number, since it is larger than the sum of its proper divisors (1).

920789 is an equidigital number, since it uses as much as digits as its factorization.

920789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 920789 is about 959.5775111996. The cubic root of 920789 is about 97.2866780320.

The spelling of 920789 in words is "nine hundred twenty thousand, seven hundred eighty-nine".