85420135193 has 2 divisors, whose sum is σ = 85420135194. Its totient is φ = 85420135192.

The previous prime is 85420135169. The next prime is 85420135237. The reversal of 85420135193 is 39153102458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82663150144 + 2756985049 = 287512^2 + 52507^2 .

It is a cyclic number.

It is not a de Polignac number, because 85420135193 - 2¹⁴ = 85420118809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85420135193.

It is not a weakly prime, because it can be changed into another prime (85420135693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42710067596 + 42710067597.

It is an arithmetic number, because the mean of its divisors is an integer number (42710067597).

Almost surely, 2^85420135193 is an apocalyptic number.

It is an amenable number.

85420135193 is a deficient number, since it is larger than the sum of its proper divisors (1).

85420135193 is an equidigital number, since it uses as much as digits as its factorization.

85420135193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 85420135193 in words is "eighty-five billion, four hundred twenty million, one hundred thirty-five thousand, one hundred ninety-three".