816039 has 12 divisors (see below), whose sum is σ = 1347216. Its totient is φ = 466272.

The previous prime is 816037. The next prime is 816043. The reversal of 816039 is 930618.

It is not a de Polignac number, because 816039 - 2¹ = 816037 is a prime.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6414 + ... + 6539.

It is an arithmetic number, because the mean of its divisors is an integer number (112268).

2⁸¹⁶⁰³⁹ is an apocalyptic number.

816039 is a deficient number, since it is larger than the sum of its proper divisors (531177).

816039 is a wasteful number, since it uses less digits than its factorization.

816039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12966 (or 12963 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 816039 is about 903.3487698558. The cubic root of 816039 is about 93.4480632756.

The spelling of 816039 in words is "eight hundred sixteen thousand, thirty-nine".