85808297 has 4 divisors (see below), whose sum is σ = 85861380. Its totient is φ = 85755216.

The previous prime is 85808269. The next prime is 85808339. The reversal of 85808297 is 79280858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79280858 = 2 ⋅39640429.

It can be written as a sum of positive squares in 2 ways, for example, as 37589161 + 48219136 = 6131^2 + 6944^2 .

It is a cyclic number.

It is not a de Polignac number, because 85808297 - 2¹⁴ = 85791913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85808207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24038 + ... + 27375.

It is an arithmetic number, because the mean of its divisors is an integer number (21465345).

Almost surely, 2^85808297 is an apocalyptic number.

It is an amenable number.

85808297 is a deficient number, since it is larger than the sum of its proper divisors (53083).

85808297 is a wasteful number, since it uses less digits than its factorization.

85808297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53082.

The product of its (nonzero) digits is 322560, while the sum is 47.

The square root of 85808297 is about 9263.2767960371. The cubic root of 85808297 is about 441.0722762780.

The spelling of 85808297 in words is "eighty-five million, eight hundred eight thousand, two hundred ninety-seven".