523587047909 has 4 divisors (see below), whose sum is σ = 523598179404. Its totient is φ = 523575916416.

The previous prime is 523587047831. The next prime is 523587047959. The reversal of 523587047909 is 909740785325.

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 44104200100 + 479482847809 = 210010^2 + 692447^2 .

It is a cyclic number.

It is not a de Polignac number, because 523587047909 - 2³⁶ = 454867571173 is a prime.

It is a super-2 number, since 2×523587047909² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523587047959) 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, 5494892 + ... + 5589365.

It is an arithmetic number, because the mean of its divisors is an integer number (130899544851).

Almost surely, 2^523587047909 is an apocalyptic number.

It is an amenable number.

523587047909 is a deficient number, since it is larger than the sum of its proper divisors (11131495).

523587047909 is a wasteful number, since it uses less digits than its factorization.

523587047909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11131494.

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 523587047909 in words is "five hundred twenty-three billion, five hundred eighty-seven million, forty-seven thousand, nine hundred nine".