8387806913 has 4 divisors (see below), whose sum is σ = 8464759380. Its totient is φ = 8310854448.

The previous prime is 8387806901. The next prime is 8387806961. The reversal of 8387806913 is 3196087838.

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 6494425744 + 1893381169 = 80588^2 + 43513^2 .

It is a cyclic number.

It is not a de Polignac number, because 8387806913 - 2¹⁸ = 8387544769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8387806013) 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, 38476070 + ... + 38476287.

It is an arithmetic number, because the mean of its divisors is an integer number (2116189845).

Almost surely, 2^8387806913 is an apocalyptic number.

It is an amenable number.

8387806913 is a deficient number, since it is larger than the sum of its proper divisors (76952467).

8387806913 is a wasteful number, since it uses less digits than its factorization.

8387806913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76952466.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 8387806913 is about 91584.9709996132. The cubic root of 8387806913 is about 2031.8086651824.

The spelling of 8387806913 in words is "eight billion, three hundred eighty-seven million, eight hundred six thousand, nine hundred thirteen".