85123391 has 8 divisors (see below), whose sum is σ = 90077184. Its totient is φ = 80274040.

The previous prime is 85123373. The next prime is 85123397. The reversal of 85123391 is 19332158.

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 85123391 - 2¹⁴ = 85107007 is a prime.

It is a super-3 number, since 3×85123391³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85123397) 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, 24431 + ... + 27696.

It is an arithmetic number, because the mean of its divisors is an integer number (11259648).

Almost surely, 2^85123391 is an apocalyptic number.

85123391 is a deficient number, since it is larger than the sum of its proper divisors (4953793).

85123391 is a wasteful number, since it uses less digits than its factorization.

85123391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52221.

The product of its digits is 6480, while the sum is 32.

The square root of 85123391 is about 9226.2338470256. The cubic root of 85123391 is about 439.8956209018.

It can be divided in two parts, 851 and 23391, that added together give a palindrome (24242).

The spelling of 85123391 in words is "eighty-five million, one hundred twenty-three thousand, three hundred ninety-one".