85417709 has 4 divisors (see below), whose sum is σ = 91988316. Its totient is φ = 78847104.

The previous prime is 85417693. The next prime is 85417727. The reversal of 85417709 is 90771458.

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 7590025 + 77827684 = 2755^2 + 8822^2 .

It is a cyclic number.

It is not a de Polignac number, because 85417709 - 2⁴ = 85417693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85417729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3285284 + ... + 3285309.

It is an arithmetic number, because the mean of its divisors is an integer number (22997079).

Almost surely, 2^85417709 is an apocalyptic number.

It is an amenable number.

85417709 is a deficient number, since it is larger than the sum of its proper divisors (6570607).

85417709 is a wasteful number, since it uses less digits than its factorization.

85417709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6570606.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 85417709 is about 9242.1701455881. The cubic root of 85417709 is about 440.4020240912.

The spelling of 85417709 in words is "eighty-five million, four hundred seventeen thousand, seven hundred nine".