8399705 has 16 divisors (see below), whose sum is σ = 10633680. Its totient is φ = 6359808.

The previous prime is 8399701. The next prime is 8399707. The reversal of 8399705 is 5079938.

It can be written as a sum of positive squares in 8 ways, for example, as 1201216 + 7198489 = 1096^2 + 2683^2 .

It is a cyclic number.

It is not a de Polignac number, because 8399705 - 2² = 8399701 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8399701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7139 + ... + 8231.

It is an arithmetic number, because the mean of its divisors is an integer number (664605).

Almost surely, 2^8399705 is an apocalyptic number.

It is an amenable number.

8399705 is a deficient number, since it is larger than the sum of its proper divisors (2233975).

8399705 is a wasteful number, since it uses less digits than its factorization.

8399705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 8399705 is about 2898.2244564561. The cubic root of 8399705 is about 203.2768916770.

It can be divided in two parts, 8399 and 705, that multiplied together give a palindrome (5921295).

The spelling of 8399705 in words is "eight million, three hundred ninety-nine thousand, seven hundred five".