86910681 has 48 divisors (see below), whose sum is σ = 144825408. Its totient is φ = 45696000.

The previous prime is 86910671. The next prime is 86910683. The reversal of 86910681 is 18601968.

It is not a de Polignac number, because 86910681 - 2¹⁹ = 86386393 is a prime.

It is a super-2 number, since 2×86910681² = 15106932943767522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86910683) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123631 + ... + 124331.

It is an arithmetic number, because the mean of its divisors is an integer number (3017196).

Almost surely, 2^86910681 is an apocalyptic number.

It is an amenable number.

86910681 is a deficient number, since it is larger than the sum of its proper divisors (57914727).

86910681 is a wasteful number, since it uses less digits than its factorization.

86910681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 86910681 is about 9322.5898225761. The cubic root of 86910681 is about 442.9530716476.

The spelling of 86910681 in words is "eighty-six million, nine hundred ten thousand, six hundred eighty-one".