85170523393 has 2 divisors, whose sum is σ = 85170523394. Its totient is φ = 85170523392.

The previous prime is 85170523363. The next prime is 85170523423. The reversal of 85170523393 is 39332507158.

It is a balanced prime because it is at equal distance from previous prime (85170523363) and next prime (85170523423).

It can be written as a sum of positive squares in only one way, i.e., 43755017329 + 41415506064 = 209177^2 + 203508^2 .

It is a cyclic number.

It is not a de Polignac number, because 85170523393 - 2¹³ = 85170515201 is a prime.

It is not a weakly prime, because it can be changed into another prime (85170523303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42585261696 + 42585261697.

It is an arithmetic number, because the mean of its divisors is an integer number (42585261697).

Almost surely, 2^85170523393 is an apocalyptic number.

It is an amenable number.

85170523393 is a deficient number, since it is larger than the sum of its proper divisors (1).

85170523393 is an equidigital number, since it uses as much as digits as its factorization.

85170523393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 85170523393 in words is "eighty-five billion, one hundred seventy million, five hundred twenty-three thousand, three hundred ninety-three".