85017599 has 4 divisors (see below), whose sum is σ = 85812264. Its totient is φ = 84222936.

The previous prime is 85017577. The next prime is 85017617. The reversal of 85017599 is 99571058.

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 85017599 - 2²⁴ = 68240383 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85017199) 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, 397172 + ... + 397385.

It is an arithmetic number, because the mean of its divisors is an integer number (21453066).

Almost surely, 2^85017599 is an apocalyptic number.

85017599 is a deficient number, since it is larger than the sum of its proper divisors (794665).

85017599 is a wasteful number, since it uses less digits than its factorization.

85017599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794664.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 85017599 is about 9220.4988476763. The cubic root of 85017599 is about 439.7133101435.

The spelling of 85017599 in words is "eighty-five million, seventeen thousand, five hundred ninety-nine".