85677881 has 4 divisors (see below), whose sum is σ = 85717632. Its totient is φ = 85638132.

The previous prime is 85677871. The next prime is 85677899. The reversal of 85677881 is 18877658.

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: 18877658 = 2 ⋅9438829.

It is a cyclic number.

It is not a de Polignac number, because 85677881 - 2⁶ = 85677817 is a prime.

It is a super-2 number, since 2×85677881² = 14681398585300322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85677871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16445 + ... + 21018.

It is an arithmetic number, because the mean of its divisors is an integer number (21429408).

Almost surely, 2^85677881 is an apocalyptic number.

It is an amenable number.

85677881 is a deficient number, since it is larger than the sum of its proper divisors (39751).

85677881 is a wasteful number, since it uses less digits than its factorization.

85677881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39750.

The product of its digits is 752640, while the sum is 50.

The square root of 85677881 is about 9256.2347096430. The cubic root of 85677881 is about 440.8487079645.

The spelling of 85677881 in words is "eighty-five million, six hundred seventy-seven thousand, eight hundred eighty-one".