86571384973 has 2 divisors, whose sum is σ = 86571384974. Its totient is φ = 86571384972.

The previous prime is 86571384947. The next prime is 86571384979. The reversal of 86571384973 is 37948317568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45176227209 + 41395157764 = 212547^2 + 203458^2 .

It is a cyclic number.

It is not a de Polignac number, because 86571384973 - 2⁹ = 86571384461 is a prime.

It is a super-2 number, since 2×86571384973² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86571384979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43285692486 + 43285692487.

It is an arithmetic number, because the mean of its divisors is an integer number (43285692487).

Almost surely, 2^86571384973 is an apocalyptic number.

It is an amenable number.

86571384973 is a deficient number, since it is larger than the sum of its proper divisors (1).

86571384973 is an equidigital number, since it uses as much as digits as its factorization.

86571384973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 61.

The spelling of 86571384973 in words is "eighty-six billion, five hundred seventy-one million, three hundred eighty-four thousand, nine hundred seventy-three".