816087 has 4 divisors (see below), whose sum is σ = 1088120. Its totient is φ = 544056.

The previous prime is 816077. The next prime is 816091. The reversal of 816087 is 780618.

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

It is not a de Polignac number, because 816087 - 2⁸ = 815831 is a prime.

It is a D-number.

It is a Duffinian number.

816087 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816037) 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, 136012 + ... + 136017.

It is an arithmetic number, because the mean of its divisors is an integer number (272030).

2⁸¹⁶⁰⁸⁷ is an apocalyptic number.

816087 is a deficient number, since it is larger than the sum of its proper divisors (272033).

816087 is a wasteful number, since it uses less digits than its factorization.

816087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272032.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 816087 is about 903.3753372768. The cubic root of 816087 is about 93.4498954671.

The spelling of 816087 in words is "eight hundred sixteen thousand, eighty-seven".