85947889 has 4 divisors (see below), whose sum is σ = 86027760. Its totient is φ = 85868020.

The previous prime is 85947877. The next prime is 85947919. The reversal of 85947889 is 98874958.

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 85947889 - 2⁷ = 85947761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85947809) 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 3 ways as a sum of consecutive naturals, for example, 38299 + ... + 40480.

It is an arithmetic number, because the mean of its divisors is an integer number (21506940).

Almost surely, 2^85947889 is an apocalyptic number.

It is an amenable number.

85947889 is a deficient number, since it is larger than the sum of its proper divisors (79871).

85947889 is a wasteful number, since it uses less digits than its factorization.

85947889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79870.

The product of its digits is 5806080, while the sum is 58.

The square root of 85947889 is about 9270.8084329254. The cubic root of 85947889 is about 441.3113238847.

The spelling of 85947889 in words is "eighty-five million, nine hundred forty-seven thousand, eight hundred eighty-nine".