85751447 has 4 divisors (see below), whose sum is σ = 85928016. Its totient is φ = 85574880.

The previous prime is 85751443. The next prime is 85751467. The reversal of 85751447 is 74415758.

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

It is a cyclic number.

It is not a de Polignac number, because 85751447 - 2² = 85751443 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 (85751441) 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, 87554 + ... + 88527.

It is an arithmetic number, because the mean of its divisors is an integer number (21482004).

Almost surely, 2^85751447 is an apocalyptic number.

85751447 is a deficient number, since it is larger than the sum of its proper divisors (176569).

85751447 is a wasteful number, since it uses less digits than its factorization.

85751447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176568.

The product of its digits is 156800, while the sum is 41.

The square root of 85751447 is about 9260.2077190525. The cubic root of 85751447 is about 440.9748478653.

The spelling of 85751447 in words is "eighty-five million, seven hundred fifty-one thousand, four hundred forty-seven".