86407681 has 4 divisors (see below), whose sum is σ = 87038532. Its totient is φ = 85776832.

The previous prime is 86407663. The next prime is 86407709. The reversal of 86407681 is 18670468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28890625 + 57517056 = 5375^2 + 7584^2 .

It is a cyclic number.

It is not a de Polignac number, because 86407681 - 2⁷ = 86407553 is a prime.

It is a super-2 number, since 2×86407681² = 14932574671595522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86407661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315220 + ... + 315493.

It is an arithmetic number, because the mean of its divisors is an integer number (21759633).

Almost surely, 2^86407681 is an apocalyptic number.

It is an amenable number.

86407681 is a deficient number, since it is larger than the sum of its proper divisors (630851).

86407681 is a wasteful number, since it uses less digits than its factorization.

86407681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630850.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 86407681 is about 9295.5731937304. The cubic root of 86407681 is about 442.0968799329.

The spelling of 86407681 in words is "eighty-six million, four hundred seven thousand, six hundred eighty-one".