86447849 has 2 divisors, whose sum is σ = 86447850. Its totient is φ = 86447848.

The previous prime is 86447843. The next prime is 86447887. The reversal of 86447849 is 94874468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67897600 + 18550249 = 8240^2 + 4307^2 .

It is a cyclic number.

It is not a de Polignac number, because 86447849 - 2⁴ = 86447833 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 86447797 and 86447806.

It is not a weakly prime, because it can be changed into another prime (86447843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43223924 + 43223925.

It is an arithmetic number, because the mean of its divisors is an integer number (43223925).

Almost surely, 2^86447849 is an apocalyptic number.

It is an amenable number.

86447849 is a deficient number, since it is larger than the sum of its proper divisors (1).

86447849 is an equidigital number, since it uses as much as digits as its factorization.

86447849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 50.

The square root of 86447849 is about 9297.7335410303. The cubic root of 86447849 is about 442.1653746016.

The spelling of 86447849 in words is "eighty-six million, four hundred forty-seven thousand, eight hundred forty-nine".