870359509 has 4 divisors (see below), whose sum is σ = 882282316. Its totient is φ = 858436704.

The previous prime is 870359461. The next prime is 870359519. The reversal of 870359509 is 905953078.

870359509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 209612484 + 660747025 = 14478^2 + 25705^2 .

It is a cyclic number.

It is not a de Polignac number, because 870359509 - 2⁹ = 870358997 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 (870359519) 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, 5961294 + ... + 5961439.

It is an arithmetic number, because the mean of its divisors is an integer number (220570579).

Almost surely, 2^870359509 is an apocalyptic number.

It is an amenable number.

870359509 is a deficient number, since it is larger than the sum of its proper divisors (11922807).

870359509 is a wasteful number, since it uses less digits than its factorization.

870359509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11922806.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 870359509 is about 29501.8560263587. The cubic root of 870359509 is about 954.7717477584.

The spelling of 870359509 in words is "eight hundred seventy million, three hundred fifty-nine thousand, five hundred nine".