86211893 has 2 divisors, whose sum is σ = 86211894. Its totient is φ = 86211892.

The previous prime is 86211877. The next prime is 86211901. The reversal of 86211893 is 39811268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43270084 + 42941809 = 6578^2 + 6553^2 .

It is a cyclic number.

It is not a de Polignac number, because 86211893 - 2⁴ = 86211877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86211833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43105946 + 43105947.

It is an arithmetic number, because the mean of its divisors is an integer number (43105947).

Almost surely, 2^86211893 is an apocalyptic number.

It is an amenable number.

86211893 is a deficient number, since it is larger than the sum of its proper divisors (1).

86211893 is an equidigital number, since it uses as much as digits as its factorization.

86211893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 86211893 is about 9285.0359719282. The cubic root of 86211893 is about 441.7627170398.

The spelling of 86211893 in words is "eighty-six million, two hundred eleven thousand, eight hundred ninety-three".