816089 has 8 divisors (see below), whose sum is σ = 855360. Its totient is φ = 777616.

The previous prime is 816077. The next prime is 816091. The reversal of 816089 is 980618.

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 816089 - 2¹⁶ = 750553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (816019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2972 + ... + 3234.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2⁸¹⁶⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

816089 is a deficient number, since it is larger than the sum of its proper divisors (39271).

816089 is a wasteful number, since it uses less digits than its factorization.

816089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 816089 is about 903.3764442357. The cubic root of 816089 is about 93.4499718068.

The spelling of 816089 in words is "eight hundred sixteen thousand, eighty-nine".