916909 has 4 divisors (see below), whose sum is σ = 1047904. Its totient is φ = 785916.

The previous prime is 916907. The next prime is 916913. The reversal of 916909 is 909619.

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: 909619 = 17 ⋅53507.

It is a cyclic number.

It is not a de Polignac number, because 916909 - 2¹ = 916907 is a prime.

It is a super-2 number, since 2×916909² = 1681444228562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916907) 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, 65487 + ... + 65500.

It is an arithmetic number, because the mean of its divisors is an integer number (261976).

2⁹¹⁶⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

916909 is a deficient number, since it is larger than the sum of its proper divisors (130995).

916909 is a wasteful number, since it uses less digits than its factorization.

916909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130994.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 916909 is about 957.5536538492. The cubic root of 916909 is about 97.1498375071.

The spelling of 916909 in words is "nine hundred sixteen thousand, nine hundred nine".