85919647 has 4 divisors (see below), whose sum is σ = 93730536. Its totient is φ = 78108760.

The previous prime is 85919627. The next prime is 85919711. The reversal of 85919647 is 74691958.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85919647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85919647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85919627) 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, 3905428 + ... + 3905449.

It is an arithmetic number, because the mean of its divisors is an integer number (23432634).

Almost surely, 2^85919647 is an apocalyptic number.

85919647 is a deficient number, since it is larger than the sum of its proper divisors (7810889).

85919647 is a wasteful number, since it uses less digits than its factorization.

85919647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810888.

The product of its digits is 544320, while the sum is 49.

The square root of 85919647 is about 9269.2851396426. The cubic root of 85919647 is about 441.2629811042.

The spelling of 85919647 in words is "eighty-five million, nine hundred nineteen thousand, six hundred forty-seven".