8061286139 has 4 divisors (see below), whose sum is σ = 8061635424. Its totient is φ = 8060936856.

The previous prime is 8061286081. The next prime is 8061286141. The reversal of 8061286139 is 9316821608.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8061286139 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 8061286139.

It is not an unprimeable number, because it can be changed into a prime (8061285139) 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, 137372 + ... + 187065.

It is an arithmetic number, because the mean of its divisors is an integer number (2015408856).

Almost surely, 2^8061286139 is an apocalyptic number.

8061286139 is a deficient number, since it is larger than the sum of its proper divisors (349285).

8061286139 is a wasteful number, since it uses less digits than its factorization.

8061286139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349284.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 8061286139 is about 89784.6653889182. The cubic root of 8061286139 is about 2005.0941918382.

The spelling of 8061286139 in words is "eight billion, sixty-one million, two hundred eighty-six thousand, one hundred thirty-nine".