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799 = 1747

799 has 4 divisors (see below), whose sum is σ = 864. Its totient is φ = 736.

The previous prime is 797. The next prime is 809. The reversal of 799 is 997.

799 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 799 - 21 = 797 is a prime.

It is a Duffinian number.

799 is a modest number, since divided by 99 gives 7 as remainder.

It is a plaindrome in base 5, base 10, base 11 and base 12.

It is a nialpdrome in base 7 and base 14.

It is a zygodrome in base 2 and base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7 + ... + 40.

It is an arithmetic number, because the mean of its divisors is an integer number (216).

799 is a deficient number, since it is larger than the sum of its proper divisors (65).

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

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

The sum of its prime factors is 64.

The product of its digits is 567, while the sum is 25.

The square root of 799 is about 28.2665880502. The cubic root of 799 is about 9.2793080637.

Subtracting from 799 its product of digits (567), we obtain a palindrome (232).

It can be divided in two parts, 79 and 9, that added together give a palindrome (88).

The spelling of 799 in words is "seven hundred ninety-nine", and thus it is an aban number and an oban number.

Divisors: 1 17 47 799