85008399 has 16 divisors (see below), whose sum is σ = 129845760. Its totient is φ = 48460320.

The previous prime is 85008379. The next prime is 85008403. The reversal of 85008399 is 99380058.

It is a Cunningham number, because it is equal to 9220²-1.

It is not a de Polignac number, because 85008399 - 2⁷ = 85008271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85008399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85008349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4609 + ... + 13829.

It is an arithmetic number, because the mean of its divisors is an integer number (8115360).

Almost surely, 2^85008399 is an apocalyptic number.

85008399 is a deficient number, since it is larger than the sum of its proper divisors (44837361).

85008399 is a wasteful number, since it uses less digits than its factorization.

85008399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9670.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 85008399 is about 9219.9999457701. Note that the first 4 decimals coincide. The cubic root of 85008399 is about 439.6974486888.

The spelling of 85008399 in words is "eighty-five million, eight thousand, three hundred ninety-nine".