85817147 has 8 divisors (see below), whose sum is σ = 93589440. Its totient is φ = 78212160.

The previous prime is 85817131. The next prime is 85817191. The reversal of 85817147 is 74171858.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85817147 - 2⁴ = 85817131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85817947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40754 + ... + 42807.

It is an arithmetic number, because the mean of its divisors is an integer number (11698680).

Almost surely, 2^85817147 is an apocalyptic number.

85817147 is a deficient number, since it is larger than the sum of its proper divisors (7772293).

85817147 is a wasteful number, since it uses less digits than its factorization.

85817147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83653.

The product of its digits is 62720, while the sum is 41.

The square root of 85817147 is about 9263.7544764528. The cubic root of 85817147 is about 441.0874393628.

The spelling of 85817147 in words is "eighty-five million, eight hundred seventeen thousand, one hundred forty-seven".