85417985 has 4 divisors (see below), whose sum is σ = 102501588. Its totient is φ = 68334384.

The previous prime is 85417973. The next prime is 85418009. The reversal of 85417985 is 58971458.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32069569 + 53348416 = 5663^2 + 7304^2 .

It is a cyclic number.

It is not a de Polignac number, because 85417985 - 2⁶ = 85417921 is a prime.

It is a super-2 number, since 2×85417985² = 14592464322920450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8541794 + ... + 8541803.

It is an arithmetic number, because the mean of its divisors is an integer number (25625397).

Almost surely, 2^85417985 is an apocalyptic number.

It is an amenable number.

85417985 is a deficient number, since it is larger than the sum of its proper divisors (17083603).

85417985 is a wasteful number, since it uses less digits than its factorization.

85417985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17083602.

The product of its digits is 403200, while the sum is 47.

The square root of 85417985 is about 9242.1850771341. The cubic root of 85417985 is about 440.4024984301.

The spelling of 85417985 in words is "eighty-five million, four hundred seventeen thousand, nine hundred eighty-five".