85872247 has 4 divisors (see below), whose sum is σ = 87869320. Its totient is φ = 83875176.

The previous prime is 85872239. The next prime is 85872251. The reversal of 85872247 is 74227858.

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 85872247 - 2³ = 85872239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1997029 = 85872247 / (8 + 5 + 8 + 7 + 2 + 2 + 4 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85872217) 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, 998472 + ... + 998557.

It is an arithmetic number, because the mean of its divisors is an integer number (21967330).

Almost surely, 2^85872247 is an apocalyptic number.

85872247 is a deficient number, since it is larger than the sum of its proper divisors (1997073).

85872247 is a wasteful number, since it uses less digits than its factorization.

85872247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997072.

The product of its digits is 250880, while the sum is 43.

The square root of 85872247 is about 9266.7279554328. The cubic root of 85872247 is about 441.1818211154.

The spelling of 85872247 in words is "eighty-five million, eight hundred seventy-two thousand, two hundred forty-seven".