85641427 has 4 divisors (see below), whose sum is σ = 90679176. Its totient is φ = 80603680.

The previous prime is 85641419. The next prime is 85641467. The reversal of 85641427 is 72414658.

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 85641427 - 2³ = 85641419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85641467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2518849 + ... + 2518882.

It is an arithmetic number, because the mean of its divisors is an integer number (22669794).

Almost surely, 2^85641427 is an apocalyptic number.

85641427 is a deficient number, since it is larger than the sum of its proper divisors (5037749).

85641427 is a wasteful number, since it uses less digits than its factorization.

85641427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037748.

The product of its digits is 53760, while the sum is 37.

The square root of 85641427 is about 9254.2653409117. The cubic root of 85641427 is about 440.7861753778.

It can be divided in two parts, 85641 and 427, that added together give a palindrome (86068).

The spelling of 85641427 in words is "eighty-five million, six hundred forty-one thousand, four hundred twenty-seven".