86911619 has 2 divisors, whose sum is σ = 86911620. Its totient is φ = 86911618.

The previous prime is 86911609. The next prime is 86911621. The reversal of 86911619 is 91611968.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86911619 - 2⁴ = 86911603 is a prime.

It is a super-2 number, since 2×86911619² = 15107259034402322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 86911621, 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 (86911609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43455809 + 43455810.

It is an arithmetic number, because the mean of its divisors is an integer number (43455810).

Almost surely, 2^86911619 is an apocalyptic number.

86911619 is a deficient number, since it is larger than the sum of its proper divisors (1).

86911619 is an equidigital number, since it uses as much as digits as its factorization.

86911619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 41.

The square root of 86911619 is about 9322.6401303493. The cubic root of 86911619 is about 442.9546651935.

The spelling of 86911619 in words is "eighty-six million, nine hundred eleven thousand, six hundred nineteen".