85285237 has 2 divisors, whose sum is σ = 85285238. Its totient is φ = 85285236.

The previous prime is 85285217. The next prime is 85285241. The reversal of 85285237 is 73258258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73513476 + 11771761 = 8574^2 + 3431^2 .

It is a cyclic number.

It is not a de Polignac number, because 85285237 - 2¹¹ = 85283189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85285237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85285217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42642618 + 42642619.

It is an arithmetic number, because the mean of its divisors is an integer number (42642619).

Almost surely, 2^85285237 is an apocalyptic number.

It is an amenable number.

85285237 is a deficient number, since it is larger than the sum of its proper divisors (1).

85285237 is an equidigital number, since it uses as much as digits as its factorization.

85285237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 40.

The square root of 85285237 is about 9235.0006497022. Note that the first 3 decimals coincide. The cubic root of 85285237 is about 440.1742371236.

The spelling of 85285237 in words is "eighty-five million, two hundred eighty-five thousand, two hundred thirty-seven".