86587819 has 2 divisors, whose sum is σ = 86587820. Its totient is φ = 86587818.

The previous prime is 86587811. The next prime is 86587843. The reversal of 86587819 is 91878568.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86587819 - 2³ = 86587811 is a prime.

It is a super-2 number, since 2×86587819² = 14994900798353522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86587811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43293909 + 43293910.

It is an arithmetic number, because the mean of its divisors is an integer number (43293910).

Almost surely, 2^86587819 is an apocalyptic number.

86587819 is a deficient number, since it is larger than the sum of its proper divisors (1).

86587819 is an equidigital number, since it uses as much as digits as its factorization.

86587819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 52.

The square root of 86587819 is about 9305.2575998733. The cubic root of 86587819 is about 442.4038864740.

The spelling of 86587819 in words is "eighty-six million, five hundred eighty-seven thousand, eight hundred nineteen".