86445971 has 2 divisors, whose sum is σ = 86445972. Its totient is φ = 86445970.

The previous prime is 86445929. The next prime is 86446007. The reversal of 86445971 is 17954468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86445971 - 2¹⁰ = 86444947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86445071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43222985 + 43222986.

It is an arithmetic number, because the mean of its divisors is an integer number (43222986).

Almost surely, 2^86445971 is an apocalyptic number.

86445971 is a deficient number, since it is larger than the sum of its proper divisors (1).

86445971 is an equidigital number, since it uses as much as digits as its factorization.

86445971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 86445971 is about 9297.6325481275. The cubic root of 86445971 is about 442.1621726998.

The spelling of 86445971 in words is "eighty-six million, four hundred forty-five thousand, nine hundred seventy-one".