85186729 has 4 divisors (see below), whose sum is σ = 87934720. Its totient is φ = 82438740.

The previous prime is 85186663. The next prime is 85186753. The reversal of 85186729 is 92768158.

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.

It is a cyclic number.

It is not a de Polignac number, because 85186729 - 2⁹ = 85186217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85186769) 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, 1373949 + ... + 1374010.

It is an arithmetic number, because the mean of its divisors is an integer number (21983680).

Almost surely, 2^85186729 is an apocalyptic number.

It is an amenable number.

85186729 is a deficient number, since it is larger than the sum of its proper divisors (2747991).

85186729 is a wasteful number, since it uses less digits than its factorization.

85186729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747990.

The product of its digits is 241920, while the sum is 46.

The square root of 85186729 is about 9229.6657035886. The cubic root of 85186729 is about 440.0046986413.

The spelling of 85186729 in words is "eighty-five million, one hundred eighty-six thousand, seven hundred twenty-nine".