8399047 has 4 divisors (see below), whose sum is σ = 8670016. Its totient is φ = 8128080.

The previous prime is 8399021. The next prime is 8399057. The reversal of 8399047 is 7409938.

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 8399047 - 2¹⁵ = 8366279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8399057) 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, 135438 + ... + 135499.

It is an arithmetic number, because the mean of its divisors is an integer number (2167504).

Almost surely, 2^8399047 is an apocalyptic number.

8399047 is a deficient number, since it is larger than the sum of its proper divisors (270969).

8399047 is a wasteful number, since it uses less digits than its factorization.

8399047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270968.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 8399047 is about 2898.1109364550. The cubic root of 8399047 is about 203.2715835665.

The spelling of 8399047 in words is "eight million, three hundred ninety-nine thousand, forty-seven".