85318681 has 4 divisors (see below), whose sum is σ = 97507072. Its totient is φ = 73130292.

The previous prime is 85318679. The next prime is 85318691. The reversal of 85318681 is 18681358.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18681358 = 2 ⋅9340679.

It is a cyclic number.

It is not a de Polignac number, because 85318681 - 2¹ = 85318679 is a prime.

It is a super-2 number, since 2×85318681² = 14558554655159522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85318621) 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 3 ways as a sum of consecutive naturals, for example, 6094185 + ... + 6094198.

It is an arithmetic number, because the mean of its divisors is an integer number (24376768).

Almost surely, 2^85318681 is an apocalyptic number.

It is an amenable number.

85318681 is a deficient number, since it is larger than the sum of its proper divisors (12188391).

85318681 is a wasteful number, since it uses less digits than its factorization.

85318681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12188390.

The product of its digits is 46080, while the sum is 40.

The square root of 85318681 is about 9236.8111921810. The cubic root of 85318681 is about 440.2317666713.

The spelling of 85318681 in words is "eighty-five million, three hundred eighteen thousand, six hundred eighty-one".