85146981 has 16 divisors (see below), whose sum is σ = 115617600. Its totient is φ = 55728000.

The previous prime is 85146979. The next prime is 85147001. The reversal of 85146981 is 18964158.

It is not a de Polignac number, because 85146981 - 2¹ = 85146979 is a prime.

It is a super-2 number, since 2×85146981² = 14500016746828722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85146781) 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, 54195 + ... + 55743.

It is an arithmetic number, because the mean of its divisors is an integer number (7226100).

Almost surely, 2^85146981 is an apocalyptic number.

It is an amenable number.

85146981 is a deficient number, since it is larger than the sum of its proper divisors (30470619).

85146981 is a wasteful number, since it uses less digits than its factorization.

85146981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876.

The product of its digits is 69120, while the sum is 42.

The square root of 85146981 is about 9227.5121782634. The cubic root of 85146981 is about 439.9362528171.

The spelling of 85146981 in words is "eighty-five million, one hundred forty-six thousand, nine hundred eighty-one".