85084981 has 16 divisors (see below), whose sum is σ = 91155456. Its totient is φ = 79238016.

The previous prime is 85084973. The next prime is 85084991. The reversal of 85084981 is 18948058.

It is a cyclic number.

It is not a de Polignac number, because 85084981 - 2³ = 85084973 is a prime.

It is a super-2 number, since 2×85084981² = 14478907983540722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85084991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271681 + ... + 271993.

It is an arithmetic number, because the mean of its divisors is an integer number (5697216).

Almost surely, 2^85084981 is an apocalyptic number.

It is an amenable number.

85084981 is a deficient number, since it is larger than the sum of its proper divisors (6070475).

85084981 is a wasteful number, since it uses less digits than its factorization.

85084981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 85084981 is about 9224.1520477494. The cubic root of 85084981 is about 439.8294466395.

The spelling of 85084981 in words is "eighty-five million, eighty-four thousand, nine hundred eighty-one".