85205287 has 2 divisors, whose sum is σ = 85205288. Its totient is φ = 85205286.

The previous prime is 85205269. The next prime is 85205293. The reversal of 85205287 is 78250258.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85205287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85205297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42602643 + 42602644.

It is an arithmetic number, because the mean of its divisors is an integer number (42602644).

Almost surely, 2^85205287 is an apocalyptic number.

85205287 is a deficient number, since it is larger than the sum of its proper divisors (1).

85205287 is an equidigital number, since it uses as much as digits as its factorization.

85205287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 85205287 is about 9230.6709940285. The cubic root of 85205287 is about 440.0366481182.

The spelling of 85205287 in words is "eighty-five million, two hundred five thousand, two hundred eighty-seven".