855534517 has 2 divisors, whose sum is σ = 855534518. Its totient is φ = 855534516.

The previous prime is 855534431. The next prime is 855534541. The reversal of 855534517 is 715435558.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855036081 + 498436 = 29241^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 855534517 - 2⁷ = 855534389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855534557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427767258 + 427767259.

It is an arithmetic number, because the mean of its divisors is an integer number (427767259).

Almost surely, 2^855534517 is an apocalyptic number.

It is an amenable number.

855534517 is a deficient number, since it is larger than the sum of its proper divisors (1).

855534517 is an equidigital number, since it uses as much as digits as its factorization.

855534517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420000, while the sum is 43.

The square root of 855534517 is about 29249.5216542083. The cubic root of 855534517 is about 949.3197408939.

The spelling of 855534517 in words is "eight hundred fifty-five million, five hundred thirty-four thousand, five hundred seventeen".