85649959 has 4 divisors (see below), whose sum is σ = 86481616. Its totient is φ = 84818304.

The previous prime is 85649947. The next prime is 85649981. The reversal of 85649959 is 95994658.

It is a happy number.

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 85649959 - 2¹⁷ = 85518887 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 (85649059) 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, 415674 + ... + 415879.

It is an arithmetic number, because the mean of its divisors is an integer number (21620404).

Almost surely, 2^85649959 is an apocalyptic number.

85649959 is a deficient number, since it is larger than the sum of its proper divisors (831657).

85649959 is a wasteful number, since it uses less digits than its factorization.

85649959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831656.

The product of its digits is 3499200, while the sum is 55.

The square root of 85649959 is about 9254.7263060557. The cubic root of 85649959 is about 440.8008126193.

The spelling of 85649959 in words is "eighty-five million, six hundred forty-nine thousand, nine hundred fifty-nine".