86443619 has 2 divisors, whose sum is σ = 86443620. Its totient is φ = 86443618.

The previous prime is 86443613. The next prime is 86443639. The reversal of 86443619 is 91634468.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86443619 - 2⁴ = 86443603 is a prime.

It is a super-2 number, since 2×86443619² = 14944998531634322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86443613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43221809 + 43221810.

It is an arithmetic number, because the mean of its divisors is an integer number (43221810).

Almost surely, 2^86443619 is an apocalyptic number.

86443619 is a deficient number, since it is larger than the sum of its proper divisors (1).

86443619 is an equidigital number, since it uses as much as digits as its factorization.

86443619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 86443619 is about 9297.5060634559. The cubic root of 86443619 is about 442.1581625847.

The spelling of 86443619 in words is "eighty-six million, four hundred forty-three thousand, six hundred nineteen".