799649 has 4 divisors (see below), whose sum is σ = 812820. Its totient is φ = 786480.

The previous prime is 799637. The next prime is 799651. The reversal of 799649 is 946997.

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 135424 + 664225 = 368^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 799649 - 2⁴ = 799633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (799609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6494 + ... + 6615.

It is an arithmetic number, because the mean of its divisors is an integer number (203205).

2⁷⁹⁹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

799649 is a deficient number, since it is larger than the sum of its proper divisors (13171).

799649 is a wasteful number, since it uses less digits than its factorization.

799649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13170.

The product of its digits is 122472, while the sum is 44.

The square root of 799649 is about 894.2309545078. The cubic root of 799649 is about 92.8181980388.

The spelling of 799649 in words is "seven hundred ninety-nine thousand, six hundred forty-nine".