8399020459 has 4 divisors (see below), whose sum is σ = 8893080504. Its totient is φ = 7904960416.

The previous prime is 8399020453. The next prime is 8399020477. The reversal of 8399020459 is 9540209938.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8399020459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8399020453) 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, 247029997 + ... + 247030030.

It is an arithmetic number, because the mean of its divisors is an integer number (2223270126).

Almost surely, 2^8399020459 is an apocalyptic number.

8399020459 is a deficient number, since it is larger than the sum of its proper divisors (494060045).

8399020459 is a wasteful number, since it uses less digits than its factorization.

8399020459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494060044.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 8399020459 is about 91646.1699090584. The cubic root of 8399020459 is about 2032.7136945340.

The spelling of 8399020459 in words is "eight billion, three hundred ninety-nine million, twenty thousand, four hundred fifty-nine".