8521379017 has 4 divisors (see below), whose sum is σ = 8751686596. Its totient is φ = 8291071440.

The previous prime is 8521378981. The next prime is 8521379029. The reversal of 8521379017 is 7109731258.

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 6841936656 + 1679442361 = 82716^2 + 40981^2 .

It is a cyclic number.

It is not a de Polignac number, because 8521379017 - 2⁷ = 8521378889 is a prime.

It is a super-2 number, since 2×8521379017² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8521379077) 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, 115153734 + ... + 115153807.

It is an arithmetic number, because the mean of its divisors is an integer number (2187921649).

Almost surely, 2^8521379017 is an apocalyptic number.

It is an amenable number.

8521379017 is a deficient number, since it is larger than the sum of its proper divisors (230307579).

8521379017 is a wasteful number, since it uses less digits than its factorization.

8521379017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230307578.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 8521379017 is about 92311.3157581453. The cubic root of 8521379017 is about 2042.5371336297.

The spelling of 8521379017 in words is "eight billion, five hundred twenty-one million, three hundred seventy-nine thousand, seventeen".