84510905317 has 4 divisors (see below), whose sum is σ = 84815999116. Its totient is φ = 84205811520.

The previous prime is 84510905293. The next prime is 84510905341. The reversal of 84510905317 is 71350901548.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (84510905293) and next prime (84510905341).

It can be written as a sum of positive squares in 2 ways, for example, as 23568083361 + 60942821956 = 153519^2 + 246866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84510905317 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 (84510905917) 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, 152546484 + ... + 152547037.

It is an arithmetic number, because the mean of its divisors is an integer number (21203999779).

Almost surely, 2^84510905317 is an apocalyptic number.

It is an amenable number.

84510905317 is a deficient number, since it is larger than the sum of its proper divisors (305093799).

84510905317 is a wasteful number, since it uses less digits than its factorization.

84510905317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305093798.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 84510905317 in words is "eighty-four billion, five hundred ten million, nine hundred five thousand, three hundred seventeen".