85088981 has 8 divisors (see below), whose sum is σ = 87360000. Its totient is φ = 82827360.

The previous prime is 85088951. The next prime is 85088999. The reversal of 85088981 is 18988058.

85088981 = 138² + 139² + ... + 636².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85088981 - 2⁶ = 85088917 is a prime.

It is a super-2 number, since 2×85088981² = 14480269375236722, 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 (85088921) 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 7 ways as a sum of consecutive naturals, for example, 18380 + ... + 22538.

It is an arithmetic number, because the mean of its divisors is an integer number (10920000).

Almost surely, 2^85088981 is an apocalyptic number.

It is an amenable number.

85088981 is a deficient number, since it is larger than the sum of its proper divisors (2271019).

85088981 is a wasteful number, since it uses less digits than its factorization.

85088981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4699.

The product of its (nonzero) digits is 184320, while the sum is 47.

The square root of 85088981 is about 9224.3688672993. The cubic root of 85088981 is about 439.8363389261.

The spelling of 85088981 in words is "eighty-five million, eighty-eight thousand, nine hundred eighty-one".