872197281 has 8 divisors (see below), whose sum is σ = 1292144160. Its totient is φ = 581464836.

The previous prime is 872197273. The next prime is 872197289. The reversal of 872197281 is 182791278.

It is an interprime number because it is at equal distance from previous prime (872197273) and next prime (872197289).

It is not a de Polignac number, because 872197281 - 2³ = 872197273 is a prime.

It is a super-3 number, since 3×872197281³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (872197289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16151775 + ... + 16151828.

It is an arithmetic number, because the mean of its divisors is an integer number (161518020).

Almost surely, 2^872197281 is an apocalyptic number.

It is an amenable number.

872197281 is a deficient number, since it is larger than the sum of its proper divisors (419946879).

872197281 is a wasteful number, since it uses less digits than its factorization.

872197281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32303612 (or 32303606 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 872197281 is about 29532.9863203842. The cubic root of 872197281 is about 955.4432784016.

The spelling of 872197281 in words is "eight hundred seventy-two million, one hundred ninety-seven thousand, two hundred eighty-one".