85714209 has 24 divisors (see below), whose sum is σ = 143095680. Its totient is φ = 48426048.

The previous prime is 85714207. The next prime is 85714249. The reversal of 85714209 is 90241758.

It is not a de Polignac number, because 85714209 - 2¹ = 85714207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85714201) 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 23 ways as a sum of consecutive naturals, for example, 2037 + ... + 13250.

It is an arithmetic number, because the mean of its divisors is an integer number (5962320).

Almost surely, 2^85714209 is an apocalyptic number.

85714209 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

85714209 is a deficient number, since it is larger than the sum of its proper divisors (57381471).

85714209 is a wasteful number, since it uses less digits than its factorization.

85714209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15389 (or 15386 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 85714209 is about 9258.1968546796. The cubic root of 85714209 is about 440.9110067698.

The spelling of 85714209 in words is "eighty-five million, seven hundred fourteen thousand, two hundred nine".