85058989 has 4 divisors (see below), whose sum is σ = 85600924. Its totient is φ = 84517056.

The previous prime is 85058983. The next prime is 85058993. The reversal of 85058989 is 98985058.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64673764 + 20385225 = 8042^2 + 4515^2 .

It is a cyclic number.

It is not a de Polignac number, because 85058989 - 2¹⁹ = 84534701 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85058983) 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, 270732 + ... + 271045.

It is an arithmetic number, because the mean of its divisors is an integer number (21400231).

Almost surely, 2^85058989 is an apocalyptic number.

It is an amenable number.

85058989 is a deficient number, since it is larger than the sum of its proper divisors (541935).

85058989 is a wasteful number, since it uses less digits than its factorization.

85058989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541934.

The product of its (nonzero) digits is 1036800, while the sum is 52.

The square root of 85058989 is about 9222.7430301402. The cubic root of 85058989 is about 439.7846552982.

The spelling of 85058989 in words is "eighty-five million, fifty-eight thousand, nine hundred eighty-nine".