85005867913 has 2 divisors, whose sum is σ = 85005867914. Its totient is φ = 85005867912.

The previous prime is 85005867887. The next prime is 85005867971. The reversal of 85005867913 is 31976850058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81908722809 + 3097145104 = 286197^2 + 55652^2 .

It is a cyclic number.

It is not a de Polignac number, because 85005867913 - 2¹⁷ = 85005736841 is a prime.

It is not a weakly prime, because it can be changed into another prime (85005867613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42502933956 + 42502933957.

It is an arithmetic number, because the mean of its divisors is an integer number (42502933957).

Almost surely, 2^85005867913 is an apocalyptic number.

It is an amenable number.

85005867913 is a deficient number, since it is larger than the sum of its proper divisors (1).

85005867913 is an equidigital number, since it uses as much as digits as its factorization.

85005867913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 85005867913 in words is "eighty-five billion, five million, eight hundred sixty-seven thousand, nine hundred thirteen".