85117951 has 4 divisors (see below), whose sum is σ = 85140904. Its totient is φ = 85095000.

The previous prime is 85117933. The next prime is 85117957. The reversal of 85117951 is 15971158.

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 85117951 - 2²¹ = 83020799 is a prime.

It is a super-3 number, since 3×85117951³ (a number of 25 digits) contains 333 as substring.

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 85117951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85117957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4500 + ... + 13801.

It is an arithmetic number, because the mean of its divisors is an integer number (21285226).

Almost surely, 2^85117951 is an apocalyptic number.

85117951 is a deficient number, since it is larger than the sum of its proper divisors (22953).

85117951 is a wasteful number, since it uses less digits than its factorization.

85117951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22952.

The product of its digits is 12600, while the sum is 37.

The square root of 85117951 is about 9225.9390307979. The cubic root of 85117951 is about 439.8862498655.

It can be divided in two parts, 85117 and 951, that added together give a palindrome (86068).

The spelling of 85117951 in words is "eighty-five million, one hundred seventeen thousand, nine hundred fifty-one".