85005619 has 4 divisors (see below), whose sum is σ = 85024744. Its totient is φ = 84986496.

The previous prime is 85005617. The next prime is 85005643. The reversal of 85005619 is 91650058.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85005619 - 2¹ = 85005617 is a prime.

It is a super-2 number, since 2×85005619² = 14451910523146322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85005617) 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 3 ways as a sum of consecutive naturals, for example, 979 + ... + 13075.

It is an arithmetic number, because the mean of its divisors is an integer number (21256186).

Almost surely, 2^85005619 is an apocalyptic number.

85005619 is a deficient number, since it is larger than the sum of its proper divisors (19125).

85005619 is a wasteful number, since it uses less digits than its factorization.

85005619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19124.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 85005619 is about 9219.8491853175. The cubic root of 85005619 is about 439.6926555458.

The spelling of 85005619 in words is "eighty-five million, five thousand, six hundred nineteen".