945209 has 2 divisors, whose sum is σ = 945210. Its totient is φ = 945208.

The previous prime is 945179. The next prime is 945211. The reversal of 945209 is 902549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 896809 + 48400 = 947^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 945209 - 2⁸ = 944953 is a prime.

Together with 945211, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (945289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472604 + 472605.

It is an arithmetic number, because the mean of its divisors is an integer number (472605).

2⁹⁴⁵²⁰⁹ is an apocalyptic number.

It is an amenable number.

945209 is a deficient number, since it is larger than the sum of its proper divisors (1).

945209 is an equidigital number, since it uses as much as digits as its factorization.

945209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 945209 is about 972.2185968186. The cubic root of 945209 is about 98.1392231942.

The spelling of 945209 in words is "nine hundred forty-five thousand, two hundred nine".