87306681 has 24 divisors (see below), whose sum is σ = 147727584. Its totient is φ = 45353280.

The previous prime is 87306649. The next prime is 87306701. The reversal of 87306681 is 18660378.

It is not a de Polignac number, because 87306681 - 2⁵ = 87306649 is a prime.

It is a super-2 number, since 2×87306681² = 15244913094471522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87306181) 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 23 ways as a sum of consecutive naturals, for example, 25380 + ... + 28613.

It is an arithmetic number, because the mean of its divisors is an integer number (6155316).

Almost surely, 2^87306681 is an apocalyptic number.

It is an amenable number.

87306681 is a deficient number, since it is larger than the sum of its proper divisors (60420903).

87306681 is a wasteful number, since it uses less digits than its factorization.

87306681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54021 (or 54014 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 87306681 is about 9343.8044179017. The cubic root of 87306681 is about 443.6248098611.

The spelling of 87306681 in words is "eighty-seven million, three hundred six thousand, six hundred eighty-one".