85706189 has 4 divisors (see below), whose sum is σ = 86022720. Its totient is φ = 85389660.

The previous prime is 85706167. The next prime is 85706191. The reversal of 85706189 is 98160758.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98160758 = 2 ⋅49080379.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85706189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85700189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157859 + ... + 158400.

It is an arithmetic number, because the mean of its divisors is an integer number (21505680).

Almost surely, 2^85706189 is an apocalyptic number.

It is an amenable number.

85706189 is a deficient number, since it is larger than the sum of its proper divisors (316531).

85706189 is a wasteful number, since it uses less digits than its factorization.

85706189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316530.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 85706189 is about 9257.7637148504. The cubic root of 85706189 is about 440.8972548042.

The spelling of 85706189 in words is "eighty-five million, seven hundred six thousand, one hundred eighty-nine".