8539309381 has 8 divisors (see below), whose sum is σ = 8624884320. Its totient is φ = 8454155568.

The previous prime is 8539309369. The next prime is 8539309397. The reversal of 8539309381 is 1839039358.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8539309381 - 2¹³ = 8539301189 is a prime.

It is a super-2 number, since 2×8539309381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8539309781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64446 + ... + 145711.

It is an arithmetic number, because the mean of its divisors is an integer number (1078110540).

Almost surely, 2^8539309381 is an apocalyptic number.

It is an amenable number.

8539309381 is a deficient number, since it is larger than the sum of its proper divisors (85574939).

8539309381 is a wasteful number, since it uses less digits than its factorization.

8539309381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210563.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 8539309381 is about 92408.3837159811. The cubic root of 8539309381 is about 2043.9687398281.

The spelling of 8539309381 in words is "eight billion, five hundred thirty-nine million, three hundred nine thousand, three hundred eighty-one".