8487136513 has 4 divisors (see below), whose sum is σ = 8487412528. Its totient is φ = 8486860500.

The previous prime is 8487136499. The next prime is 8487136519. The reversal of 8487136513 is 3156317848.

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 a de Polignac number, because none of the positive numbers 2^k-8487136513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8487136519) 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, 85131 + ... + 155632.

It is an arithmetic number, because the mean of its divisors is an integer number (2121853132).

Almost surely, 2^8487136513 is an apocalyptic number.

It is an amenable number.

8487136513 is a deficient number, since it is larger than the sum of its proper divisors (276015).

8487136513 is a wasteful number, since it uses less digits than its factorization.

8487136513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276014.

The product of its digits is 483840, while the sum is 46.

The square root of 8487136513 is about 92125.6561062118. The cubic root of 8487136513 is about 2039.7975347732.

The spelling of 8487136513 in words is "eight billion, four hundred eighty-seven million, one hundred thirty-six thousand, five hundred thirteen".