8399691 has 12 divisors (see below), whose sum is σ = 12771720. Its totient is φ = 5304960.

The previous prime is 8399689. The next prime is 8399701. The reversal of 8399691 is 1969938.

It is not a de Polignac number, because 8399691 - 2¹ = 8399689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8399621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24390 + ... + 24731.

It is an arithmetic number, because the mean of its divisors is an integer number (1064310).

Almost surely, 2^8399691 is an apocalyptic number.

8399691 is a deficient number, since it is larger than the sum of its proper divisors (4372029).

8399691 is a wasteful number, since it uses less digits than its factorization.

8399691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49146 (or 49143 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 8399691 is about 2898.2220411832. Note that the first 3 decimals coincide. The cubic root of 8399691 is about 203.2767787413.

The spelling of 8399691 in words is "eight million, three hundred ninety-nine thousand, six hundred ninety-one".