86175815987 has 2 divisors, whose sum is σ = 86175815988. Its totient is φ = 86175815986.

The previous prime is 86175815941. The next prime is 86175815989. The reversal of 86175815987 is 78951857168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86175815987 - 2²⁰ = 86174767411 is a prime.

It is a super-2 number, since 2×86175815987² (a number of 23 digits) contains 22 as substring.

Together with 86175815989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86175815989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43087907993 + 43087907994.

It is an arithmetic number, because the mean of its divisors is an integer number (43087907994).

Almost surely, 2^86175815987 is an apocalyptic number.

86175815987 is a deficient number, since it is larger than the sum of its proper divisors (1).

86175815987 is an equidigital number, since it uses as much as digits as its factorization.

86175815987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33868800, while the sum is 65.

The spelling of 86175815987 in words is "eighty-six billion, one hundred seventy-five million, eight hundred fifteen thousand, nine hundred eighty-seven".