85257189 has 6 divisors (see below), whose sum is σ = 123149286. Its totient is φ = 56838120.

The previous prime is 85257173. The next prime is 85257197. The reversal of 85257189 is 98175258.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48860100 + 36397089 = 6990^2 + 6033^2 .

It is not a de Polignac number, because 85257189 - 2⁴ = 85257173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85257149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4736502 + ... + 4736519.

It is an arithmetic number, because the mean of its divisors is an integer number (20524881).

Almost surely, 2^85257189 is an apocalyptic number.

It is an amenable number.

85257189 is a deficient number, since it is larger than the sum of its proper divisors (37892097).

85257189 is a wasteful number, since it uses less digits than its factorization.

85257189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9473027 (or 9473024 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 85257189 is about 9233.4819542792. The cubic root of 85257189 is about 440.1259780458.

The spelling of 85257189 in words is "eighty-five million, two hundred fifty-seven thousand, one hundred eighty-nine".