85619 has 2 divisors, whose sum is σ = 85620. Its totient is φ = 85618.

The previous prime is 85607. The next prime is 85621. The reversal of 85619 is 91658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85619 - 2⁸ = 85363 is a prime.

It is a super-2 number, since 2×85619² = 14661226322, which contains 22 as substring.

Together with 85621, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85591 and 85600.

It is not a weakly prime, because it can be changed into another prime (85639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42809 + 42810.

It is an arithmetic number, because the mean of its divisors is an integer number (42810).

2⁸⁵⁶¹⁹ is an apocalyptic number.

85619 is a deficient number, since it is larger than the sum of its proper divisors (1).

85619 is an equidigital number, since it uses as much as digits as its factorization.

85619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 85619 is about 292.6072452965. The cubic root of 85619 is about 44.0747695657.

The spelling of 85619 in words is "eighty-five thousand, six hundred nineteen".