876439009 has 4 divisors (see below), whose sum is σ = 882321300. Its totient is φ = 870556720.

The previous prime is 876438977. The next prime is 876439021. The reversal of 876439009 is 900934678.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33814225 + 842624784 = 5815^2 + 29028^2 .

It is a cyclic number.

It is not a de Polignac number, because 876439009 - 2⁵ = 876438977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 876439009.

It is not an unprimeable number, because it can be changed into a prime (876439079) 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, 2940922 + ... + 2941219.

It is an arithmetic number, because the mean of its divisors is an integer number (220580325).

Almost surely, 2^876439009 is an apocalyptic number.

It is an amenable number.

876439009 is a deficient number, since it is larger than the sum of its proper divisors (5882291).

876439009 is a wasteful number, since it uses less digits than its factorization.

876439009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882290.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 876439009 is about 29604.7126147173. The cubic root of 876439009 is about 956.9896328221.

The spelling of 876439009 in words is "eight hundred seventy-six million, four hundred thirty-nine thousand, nine".