85618947 has 16 divisors (see below), whose sum is σ = 117532800. Its totient is φ = 55406400.

The previous prime is 85618943. The next prime is 85618961. The reversal of 85618947 is 74981658.

It is not a de Polignac number, because 85618947 - 2² = 85618943 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 85618896 and 85618905.

It is not an unprimeable number, because it can be changed into a prime (85618943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24304 + ... + 27602.

It is an arithmetic number, because the mean of its divisors is an integer number (7345800).

Almost surely, 2^85618947 is an apocalyptic number.

85618947 is a deficient number, since it is larger than the sum of its proper divisors (31913853).

85618947 is a wasteful number, since it uses less digits than its factorization.

85618947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554.

The product of its digits is 483840, while the sum is 48.

The square root of 85618947 is about 9253.0506861251. The cubic root of 85618947 is about 440.7476047129.

The spelling of 85618947 in words is "eighty-five million, six hundred eighteen thousand, nine hundred forty-seven".