916209 has 12 divisors (see below), whose sum is σ = 1512576. Its totient is φ = 523512.

The previous prime is 916189. The next prime is 916213. The reversal of 916209 is 902619.

It is a happy number.

It is not a de Polignac number, because 916209 - 2⁵ = 916177 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (916219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7209 + ... + 7334.

It is an arithmetic number, because the mean of its divisors is an integer number (126048).

2⁹¹⁶²⁰⁹ is an apocalyptic number.

It is an amenable number.

916209 is a deficient number, since it is larger than the sum of its proper divisors (596367).

916209 is a wasteful number, since it uses less digits than its factorization.

916209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14556 (or 14553 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 916209 is about 957.1880692946. The cubic root of 916209 is about 97.1251086993.

The spelling of 916209 in words is "nine hundred sixteen thousand, two hundred nine".