85891789 has 8 divisors (see below), whose sum is σ = 87995808. Its totient is φ = 83812080.

The previous prime is 85891781. The next prime is 85891807. The reversal of 85891789 is 98719858.

85891789 is nontrivially palindromic in base 14.

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

It is a cyclic number.

It is not a de Polignac number, because 85891789 - 2³ = 85891781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85891781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1179 + ... + 13159.

It is an arithmetic number, because the mean of its divisors is an integer number (10999476).

Almost surely, 2^85891789 is an apocalyptic number.

It is an amenable number.

85891789 is a deficient number, since it is larger than the sum of its proper divisors (2104019).

85891789 is a wasteful number, since it uses less digits than its factorization.

85891789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12155.

The product of its digits is 1451520, while the sum is 55.

The square root of 85891789 is about 9267.7823129377. The cubic root of 85891789 is about 441.2152852497.

The spelling of 85891789 in words is "eighty-five million, eight hundred ninety-one thousand, seven hundred eighty-nine".