799647 has 4 divisors (see below), whose sum is σ = 1066200. Its totient is φ = 533096.

The previous prime is 799637. The next prime is 799651. The reversal of 799647 is 746997.

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

It is a cyclic number.

It is not a de Polignac number, because 799647 - 2¹² = 795551 is a prime.

It is an Ulam number.

It is a D-number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 799599 and 799608.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 799647.

It is not an unprimeable number, because it can be changed into a prime (799637) 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, 133272 + ... + 133277.

It is an arithmetic number, because the mean of its divisors is an integer number (266550).

2⁷⁹⁹⁶⁴⁷ is an apocalyptic number.

799647 is a deficient number, since it is larger than the sum of its proper divisors (266553).

799647 is a wasteful number, since it uses less digits than its factorization.

799647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266552.

The product of its digits is 95256, while the sum is 42.

The square root of 799647 is about 894.2298362278. The cubic root of 799647 is about 92.8181206563.

Subtracting from 799647 its reverse (746997), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 799647 in words is "seven hundred ninety-nine thousand, six hundred forty-seven".