916681 has 4 divisors (see below), whose sum is σ = 929664. Its totient is φ = 903700.

The previous prime is 916679. The next prime is 916703. The reversal of 916681 is 186619.

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.

It is a cyclic number.

It is not a de Polignac number, because 916681 - 2¹ = 916679 is a prime.

It is a super-2 number, since 2×916681² = 1680608111522, which contains 22 as substring.

It is a Duffinian number.

916681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (916621) 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 3 ways as a sum of consecutive naturals, for example, 6385 + ... + 6526.

It is an arithmetic number, because the mean of its divisors is an integer number (232416).

2⁹¹⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

916681 is a deficient number, since it is larger than the sum of its proper divisors (12983).

916681 is a wasteful number, since it uses less digits than its factorization.

916681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12982.

The product of its digits is 2592, while the sum is 31.

The square root of 916681 is about 957.4345930663. The cubic root of 916681 is about 97.1417843637.

The spelling of 916681 in words is "nine hundred sixteen thousand, six hundred eighty-one".