85517123 has 12 divisors (see below), whose sum is σ = 91179000. Its totient is φ = 80189952.

The previous prime is 85517099. The next prime is 85517129. The reversal of 85517123 is 32171558.

It is a de Polignac number, because none of the positive numbers 2^k-85517123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85517123.

It is not an unprimeable number, because it can be changed into a prime (85517129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143915 + ... + 144507.

It is an arithmetic number, because the mean of its divisors is an integer number (7598250).

Almost surely, 2^85517123 is an apocalyptic number.

85517123 is a deficient number, since it is larger than the sum of its proper divisors (5661877).

85517123 is a wasteful number, since it uses less digits than its factorization.

85517123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1109 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 85517123 is about 9247.5468638986. The cubic root of 85517123 is about 440.5728128458.

The spelling of 85517123 in words is "eighty-five million, five hundred seventeen thousand, one hundred twenty-three".