817031135047 has 2 divisors, whose sum is σ = 817031135048. Its totient is φ = 817031135046.

The previous prime is 817031135023. The next prime is 817031135099. The reversal of 817031135047 is 740531130718.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 817031135047 - 2³¹ = 814883651399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (817031135147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408515567523 + 408515567524.

It is an arithmetic number, because the mean of its divisors is an integer number (408515567524).

Almost surely, 2^817031135047 is an apocalyptic number.

817031135047 is a deficient number, since it is larger than the sum of its proper divisors (1).

817031135047 is an equidigital number, since it uses as much as digits as its factorization.

817031135047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 817031135047 in words is "eight hundred seventeen billion, thirty-one million, one hundred thirty-five thousand, forty-seven".