8137321539 has 16 divisors (see below), whose sum is σ = 11424238080. Its totient is φ = 5137814880.

The previous prime is 8137321529. The next prime is 8137321553. The reversal of 8137321539 is 9351237318.

It is not a de Polignac number, because 8137321539 - 2⁴ = 8137321523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8137321539.

It is not an unprimeable number, because it can be changed into a prime (8137321519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187309 + ... + 226625.

It is an arithmetic number, because the mean of its divisors is an integer number (714014880).

Almost surely, 2^8137321539 is an apocalyptic number.

8137321539 is a deficient number, since it is larger than the sum of its proper divisors (3286916541).

8137321539 is a wasteful number, since it uses less digits than its factorization.

8137321539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42970.

The product of its digits is 136080, while the sum is 42.

The square root of 8137321539 is about 90207.1035950052. The cubic root of 8137321539 is about 2011.3786025176.

The spelling of 8137321539 in words is "eight billion, one hundred thirty-seven million, three hundred twenty-one thousand, five hundred thirty-nine".