84368009 has 4 divisors (see below), whose sum is σ = 92037840. Its totient is φ = 76698180.

The previous prime is 84367993. The next prime is 84368017. The reversal of 84368009 is 90086348.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84368009 - 2⁴ = 84367993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84368069) 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, 3834899 + ... + 3834920.

It is an arithmetic number, because the mean of its divisors is an integer number (23009460).

Almost surely, 2^84368009 is an apocalyptic number.

It is an amenable number.

84368009 is a deficient number, since it is larger than the sum of its proper divisors (7669831).

84368009 is a wasteful number, since it uses less digits than its factorization.

84368009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7669830.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 84368009 is about 9185.2059857142. The cubic root of 84368009 is about 438.5905467333.

The spelling of 84368009 in words is "eighty-four million, three hundred sixty-eight thousand, nine".