86656447 has 2 divisors, whose sum is σ = 86656448. Its totient is φ = 86656446.

The previous prime is 86656357. The next prime is 86656483. The reversal of 86656447 is 74465668.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86656447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86656397 and 86656406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86656487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43328223 + 43328224.

It is an arithmetic number, because the mean of its divisors is an integer number (43328224).

Almost surely, 2^86656447 is an apocalyptic number.

86656447 is a deficient number, since it is larger than the sum of its proper divisors (1).

86656447 is an equidigital number, since it uses as much as digits as its factorization.

86656447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 46.

The square root of 86656447 is about 9308.9444621826. The cubic root of 86656447 is about 442.5207361515.

The spelling of 86656447 in words is "eighty-six million, six hundred fifty-six thousand, four hundred forty-seven".