85459999 has 4 divisors (see below), whose sum is σ = 85554720. Its totient is φ = 85365280.

The previous prime is 85459991. The next prime is 85460017. The reversal of 85459999 is 99995458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99995458 = 2 ⋅49997729.

It is a cyclic number.

It is not a de Polignac number, because 85459999 - 2³ = 85459991 is a prime.

It is a super-2 number, since 2×85459999² = 14606822858160002, which contains 22 as substring.

It is a Duffinian number.

85459999 is a modest number, since divided by 9999 gives 8545 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85459991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45994 + ... + 47815.

It is an arithmetic number, because the mean of its divisors is an integer number (21388680).

Almost surely, 2^85459999 is an apocalyptic number.

85459999 is a deficient number, since it is larger than the sum of its proper divisors (94721).

85459999 is an equidigital number, since it uses as much as digits as its factorization.

85459999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94720.

The product of its digits is 5248800, while the sum is 58.

The square root of 85459999 is about 9244.4577450492. The cubic root of 85459999 is about 440.4746925851.

The spelling of 85459999 in words is "eighty-five million, four hundred fifty-nine thousand, nine hundred ninety-nine".