8524129813 has 4 divisors (see below), whose sum is σ = 8663869708. Its totient is φ = 8384389920.

The previous prime is 8524129781. The next prime is 8524129849. The reversal of 8524129813 is 3189214258.

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 330621489 + 8193508324 = 18183^2 + 90518^2 .

It is a cyclic number.

It is not a de Polignac number, because 8524129813 - 2⁵ = 8524129781 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 8524129813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8524123813) 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, 69869856 + ... + 69869977.

It is an arithmetic number, because the mean of its divisors is an integer number (2165967427).

Almost surely, 2^8524129813 is an apocalyptic number.

It is an amenable number.

8524129813 is a deficient number, since it is larger than the sum of its proper divisors (139739895).

8524129813 is a wasteful number, since it uses less digits than its factorization.

8524129813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139739894.

The product of its digits is 138240, while the sum is 43.

The square root of 8524129813 is about 92326.2141160353. The cubic root of 8524129813 is about 2042.7568945585.

The spelling of 8524129813 in words is "eight billion, five hundred twenty-four million, one hundred twenty-nine thousand, eight hundred thirteen".