916309 has 4 divisors (see below), whose sum is σ = 938700. Its totient is φ = 893920.

The previous prime is 916291. The next prime is 916319. The reversal of 916309 is 903619.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88209 + 828100 = 297^2 + 910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-916309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (916319) 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, 11134 + ... + 11215.

It is an arithmetic number, because the mean of its divisors is an integer number (234675).

2⁹¹⁶³⁰⁹ is an apocalyptic number.

It is an amenable number.

916309 is a deficient number, since it is larger than the sum of its proper divisors (22391).

916309 is a wasteful number, since it uses less digits than its factorization.

916309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22390.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 916309 is about 957.2403042079. The cubic root of 916309 is about 97.1286421571.

It can be divided in two parts, 916 and 309, that added together give a triangular number (1225 = T₄₉).

The spelling of 916309 in words is "nine hundred sixteen thousand, three hundred nine".