85111899 has 8 divisors (see below), whose sum is σ = 113846352. Its totient is φ = 56559360.

The previous prime is 85111883. The next prime is 85111903. The reversal of 85111899 is 99811158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85111899 - 2⁴ = 85111883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85111899.

It is not an unprimeable number, because it can be changed into a prime (85111199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44382 + ... + 46259.

It is an arithmetic number, because the mean of its divisors is an integer number (14230794).

Almost surely, 2^85111899 is an apocalyptic number.

85111899 is a deficient number, since it is larger than the sum of its proper divisors (28734453).

85111899 is a wasteful number, since it uses less digits than its factorization.

85111899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90957.

The product of its digits is 25920, while the sum is 42.

The square root of 85111899 is about 9225.6110366739. The cubic root of 85111899 is about 439.8758241184.

The spelling of 85111899 in words is "eighty-five million, one hundred eleven thousand, eight hundred ninety-nine".