85317308953 has 2 divisors, whose sum is σ = 85317308954. Its totient is φ = 85317308952.

The previous prime is 85317308933. The next prime is 85317309031. The reversal of 85317308953 is 35980371358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79260267024 + 6057041929 = 281532^2 + 77827^2 .

It is a cyclic number.

It is not a de Polignac number, because 85317308953 - 2⁹ = 85317308441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85317308953.

It is not a weakly prime, because it can be changed into another prime (85317308903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42658654476 + 42658654477.

It is an arithmetic number, because the mean of its divisors is an integer number (42658654477).

Almost surely, 2^85317308953 is an apocalyptic number.

It is an amenable number.

85317308953 is a deficient number, since it is larger than the sum of its proper divisors (1).

85317308953 is an equidigital number, since it uses as much as digits as its factorization.

85317308953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 85317308953 in words is "eighty-five billion, three hundred seventeen million, three hundred eight thousand, nine hundred fifty-three".