85105489 has 4 divisors (see below), whose sum is σ = 97263424. Its totient is φ = 72947556.

The previous prime is 85105487. The next prime is 85105511. The reversal of 85105489 is 98450158.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98450158 = 2 ⋅49225079.

It is a cyclic number.

It is not a de Polignac number, because 85105489 - 2¹ = 85105487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85105483) 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, 6078957 + ... + 6078970.

It is an arithmetic number, because the mean of its divisors is an integer number (24315856).

Almost surely, 2^85105489 is an apocalyptic number.

It is an amenable number.

85105489 is a deficient number, since it is larger than the sum of its proper divisors (12157935).

85105489 is a wasteful number, since it uses less digits than its factorization.

85105489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12157934.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 85105489 is about 9225.2636276694. The cubic root of 85105489 is about 439.8647811078.

The spelling of 85105489 in words is "eighty-five million, one hundred five thousand, four hundred eighty-nine".