920217 has 4 divisors (see below), whose sum is σ = 1226960. Its totient is φ = 613476.

The previous prime is 920209. The next prime is 920219. The reversal of 920217 is 712029.

It is a happy number.

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: 712029 = 3 ⋅237343.

It is not a de Polignac number, because 920217 - 2³ = 920209 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 920193 and 920202.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920217.

It is not an unprimeable number, because it can be changed into a prime (920219) 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, 153367 + ... + 153372.

It is an arithmetic number, because the mean of its divisors is an integer number (306740).

2⁹²⁰²¹⁷ is an apocalyptic number.

It is an amenable number.

920217 is a deficient number, since it is larger than the sum of its proper divisors (306743).

920217 is a wasteful number, since it uses less digits than its factorization.

920217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306742.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 920217 is about 959.2794170626. The cubic root of 920217 is about 97.2665288242.

The spelling of 920217 in words is "nine hundred twenty thousand, two hundred seventeen".