916985 has 4 divisors (see below), whose sum is σ = 1100388. Its totient is φ = 733584.

The previous prime is 916973. The next prime is 916999. The reversal of 916985 is 589619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589619 = 461 ⋅1279.

It can be written as a sum of positive squares in 2 ways, for example, as 218089 + 698896 = 467^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 916985 - 2¹⁰ = 915961 is a prime.

It is a super-2 number, since 2×916985² = 1681722980450, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 916985.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91694 + ... + 91703.

It is an arithmetic number, because the mean of its divisors is an integer number (275097).

2⁹¹⁶⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

916985 is a deficient number, since it is larger than the sum of its proper divisors (183403).

916985 is a wasteful number, since it uses less digits than its factorization.

916985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183402.

The product of its digits is 19440, while the sum is 38.

The square root of 916985 is about 957.5933374873. The cubic root of 916985 is about 97.1525215916.

The spelling of 916985 in words is "nine hundred sixteen thousand, nine hundred eighty-five".