868221147 has 8 divisors (see below), whose sum is σ = 1165002256. Its totient is φ = 575127072.

The previous prime is 868221121. The next prime is 868221163. The reversal of 868221147 is 741122868.

It is a happy number.

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

It is not a de Polignac number, because 868221147 - 2⁷ = 868221019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868221847) 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, 921208 + ... + 922149.

It is an arithmetic number, because the mean of its divisors is an integer number (145625282).

Almost surely, 2^868221147 is an apocalyptic number.

868221147 is a deficient number, since it is larger than the sum of its proper divisors (296781109).

868221147 is a wasteful number, since it uses less digits than its factorization.

868221147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843517.

The product of its digits is 43008, while the sum is 39.

The square root of 868221147 is about 29465.5925954324. The cubic root of 868221147 is about 953.9891891676.

The spelling of 868221147 in words is "eight hundred sixty-eight million, two hundred twenty-one thousand, one hundred forty-seven".