916321 has 8 divisors (see below), whose sum is σ = 1061120. Its totient is φ = 775008.

The previous prime is 916319. The next prime is 916337. The reversal of 916321 is 123619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 916321 - 2¹ = 916319 is a prime.

It is a Duffinian number.

916321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 916292 and 916301.

It is not an unprimeable number, because it can be changed into a prime (916361) 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 7 ways as a sum of consecutive naturals, for example, 276 + ... + 1381.

It is an arithmetic number, because the mean of its divisors is an integer number (132640).

2⁹¹⁶³²¹ is an apocalyptic number.

916321 is the 553-rd octagonal number.

It is an amenable number.

916321 is a deficient number, since it is larger than the sum of its proper divisors (144799).

916321 is a wasteful number, since it uses less digits than its factorization.

916321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743.

The product of its digits is 324, while the sum is 22.

The square root of 916321 is about 957.2465722059. The cubic root of 916321 is about 97.1290661548.

The spelling of 916321 in words is "nine hundred sixteen thousand, three hundred twenty-one".