920289 has 4 divisors (see below), whose sum is σ = 1227056. Its totient is φ = 613524.

The previous prime is 920281. The next prime is 920291. The reversal of 920289 is 982029.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 982029 = 3 ⋅327343.

It is not a de Polignac number, because 920289 - 2³ = 920281 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920289.

It is not an unprimeable number, because it can be changed into a prime (920281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153379 + ... + 153384.

It is an arithmetic number, because the mean of its divisors is an integer number (306764).

2⁹²⁰²⁸⁹ is an apocalyptic number.

It is an amenable number.

920289 is a deficient number, since it is larger than the sum of its proper divisors (306767).

920289 is a wasteful number, since it uses less digits than its factorization.

920289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306766.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 920289 is about 959.3169444975. The cubic root of 920289 is about 97.2690655474.

The spelling of 920289 in words is "nine hundred twenty thousand, two hundred eighty-nine".