8409876509 has 4 divisors (see below), whose sum is σ = 8681162880. Its totient is φ = 8138590140.

The previous prime is 8409876493. The next prime is 8409876511. The reversal of 8409876509 is 9056789048.

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 8409876509 - 2⁴ = 8409876493 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 (8409876529) 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, 135643139 + ... + 135643200.

It is an arithmetic number, because the mean of its divisors is an integer number (2170290720).

Almost surely, 2^8409876509 is an apocalyptic number.

It is an amenable number.

8409876509 is a deficient number, since it is larger than the sum of its proper divisors (271286371).

8409876509 is a wasteful number, since it uses less digits than its factorization.

8409876509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271286370.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The square root of 8409876509 is about 91705.3788444277. The cubic root of 8409876509 is about 2033.5891037897.

The spelling of 8409876509 in words is "eight billion, four hundred nine million, eight hundred seventy-six thousand, five hundred nine".