868147 has 4 divisors (see below), whose sum is σ = 992176. Its totient is φ = 744120.

The previous prime is 868123. The next prime is 868151. The reversal of 868147 is 741868.

It is a happy number.

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 868147 - 2⁷ = 868019 is a prime.

It is a Duffinian number.

868147 is a lucky number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (868157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62004 + ... + 62017.

It is an arithmetic number, because the mean of its divisors is an integer number (248044).

2⁸⁶⁸¹⁴⁷ is an apocalyptic number.

868147 is a deficient number, since it is larger than the sum of its proper divisors (124029).

868147 is a wasteful number, since it uses less digits than its factorization.

868147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124028.

The product of its digits is 10752, while the sum is 34.

The square root of 868147 is about 931.7440635711. The cubic root of 868147 is about 95.3962031167.

Subtracting from 868147 its product of digits (10752), we obtain a triangular number (857395 = T₁₃₀₉).

The spelling of 868147 in words is "eight hundred sixty-eight thousand, one hundred forty-seven".