71965085 has 8 divisors (see below), whose sum is σ = 86797656. Its totient is φ = 57279040.

The previous prime is 71965081. The next prime is 71965087. The reversal of 71965085 is 58056917.

It can be written as a sum of positive squares in 4 ways, for example, as 7628644 + 64336441 = 2762^2 + 8021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71965085 - 2² = 71965081 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 (71965081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35546 + ... + 37515.

It is an arithmetic number, because the mean of its divisors is an integer number (10849707).

Almost surely, 2^71965085 is an apocalyptic number.

It is an amenable number.

71965085 is a deficient number, since it is larger than the sum of its proper divisors (14832571).

71965085 is a wasteful number, since it uses less digits than its factorization.

71965085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73263.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 71965085 is about 8483.2237386503. The cubic root of 71965085 is about 415.9495073239.

The spelling of 71965085 in words is "seventy-one million, nine hundred sixty-five thousand, eighty-five".