855328517 has 8 divisors (see below), whose sum is σ = 867552024. Its totient is φ = 843118848.

The previous prime is 855328501. The next prime is 855328547. The reversal of 855328517 is 715823558.

It is a Cunningham number, because it is equal to 29246²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 283114276 + 572214241 = 16826^2 + 23921^2 .

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 855328517 - 2⁴ = 855328501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855328547) 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, 247433 + ... + 250865.

It is an arithmetic number, because the mean of its divisors is an integer number (108444003).

Almost surely, 2^855328517 is an apocalyptic number.

It is an amenable number.

855328517 is a deficient number, since it is larger than the sum of its proper divisors (12223507).

855328517 is a wasteful number, since it uses less digits than its factorization.

855328517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6919.

The product of its digits is 336000, while the sum is 44.

The square root of 855328517 is about 29246.0000170964. Note that the first 4 decimals coincide. The cubic root of 855328517 is about 949.2435407482.

It can be divided in two parts, 85532 and 8517, that added together give a palindrome (94049).

The spelling of 855328517 in words is "eight hundred fifty-five million, three hundred twenty-eight thousand, five hundred seventeen".