85111905 has 32 divisors (see below), whose sum is σ = 139864320. Its totient is φ = 44179200.

The previous prime is 85111903. The next prime is 85111907. The reversal of 85111905 is 50911158.

It is an interprime number because it is at equal distance from previous prime (85111903) and next prime (85111907).

It is not a de Polignac number, because 85111905 - 2¹ = 85111903 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85111903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119691 + ... + 120399.

It is an arithmetic number, because the mean of its divisors is an integer number (4370760).

Almost surely, 2^85111905 is an apocalyptic number.

It is an amenable number.

85111905 is a deficient number, since it is larger than the sum of its proper divisors (54752415).

85111905 is a wasteful number, since it uses less digits than its factorization.

85111905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921.

The product of its (nonzero) digits is 1800, while the sum is 30.

The square root of 85111905 is about 9225.6113618556. The cubic root of 85111905 is about 439.8758344548.

The spelling of 85111905 in words is "eighty-five million, one hundred eleven thousand, nine hundred five".