86445641 has 2 divisors, whose sum is σ = 86445642. Its totient is φ = 86445640.

The previous prime is 86445599. The next prime is 86445647. The reversal of 86445641 is 14654468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54760000 + 31685641 = 7400^2 + 5629^2 .

It is a cyclic number.

It is not a de Polignac number, because 86445641 - 2¹⁸ = 86183497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 86445595 and 86445604.

It is not a weakly prime, because it can be changed into another prime (86445647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43222820 + 43222821.

It is an arithmetic number, because the mean of its divisors is an integer number (43222821).

Almost surely, 2^86445641 is an apocalyptic number.

It is an amenable number.

86445641 is a deficient number, since it is larger than the sum of its proper divisors (1).

86445641 is an equidigital number, since it uses as much as digits as its factorization.

86445641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 38.

The square root of 86445641 is about 9297.6148016575. The cubic root of 86445641 is about 442.1616100605.

The spelling of 86445641 in words is "eighty-six million, four hundred forty-five thousand, six hundred forty-one".