816049 has 4 divisors (see below), whose sum is σ = 878836. Its totient is φ = 753264.

The previous prime is 816047. The next prime is 816077. The reversal of 816049 is 940618.

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

It can be written as a sum of positive squares in 2 ways, for example, as 431649 + 384400 = 657^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 816049 - 2¹ = 816047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31374 + ... + 31399.

It is an arithmetic number, because the mean of its divisors is an integer number (219709).

2⁸¹⁶⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

816049 is a deficient number, since it is larger than the sum of its proper divisors (62787).

816049 is a wasteful number, since it uses less digits than its factorization.

816049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62786.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 816049 is about 903.3543047996. The cubic root of 816049 is about 93.4484449881.

The spelling of 816049 in words is "eight hundred sixteen thousand, forty-nine".