906217 has 4 divisors (see below), whose sum is σ = 975940. Its totient is φ = 836496.

The previous prime is 906211. The next prime is 906229. The reversal of 906217 is 712609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712609 = 23 ⋅30983.

It can be written as a sum of positive squares in 2 ways, for example, as 52441 + 853776 = 229^2 + 924^2 .

It is a cyclic number.

It is not a de Polignac number, because 906217 - 2⁷ = 906089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 906191 and 906200.

It is not an unprimeable number, because it can be changed into a prime (906211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34842 + ... + 34867.

It is an arithmetic number, because the mean of its divisors is an integer number (243985).

2⁹⁰⁶²¹⁷ is an apocalyptic number.

It is an amenable number.

906217 is a deficient number, since it is larger than the sum of its proper divisors (69723).

906217 is a wasteful number, since it uses less digits than its factorization.

906217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69722.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 906217 is about 951.9543056261. The cubic root of 906217 is about 96.7707413906.

The spelling of 906217 in words is "nine hundred six thousand, two hundred seventeen".