86605619 has 2 divisors, whose sum is σ = 86605620. Its totient is φ = 86605618.

The previous prime is 86605609. The next prime is 86605639. The reversal of 86605619 is 91650668.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86605619 is a prime.

It is a super-2 number, since 2×86605619² = 15001066484746322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86605609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43302809 + 43302810.

It is an arithmetic number, because the mean of its divisors is an integer number (43302810).

Almost surely, 2^86605619 is an apocalyptic number.

86605619 is a deficient number, since it is larger than the sum of its proper divisors (1).

86605619 is an equidigital number, since it uses as much as digits as its factorization.

86605619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 86605619 is about 9306.2139992588. The cubic root of 86605619 is about 442.4341996278.

The spelling of 86605619 in words is "eighty-six million, six hundred five thousand, six hundred nineteen".