872197289 has 2 divisors, whose sum is σ = 872197290. Its totient is φ = 872197288.

The previous prime is 872197273. The next prime is 872197297. The reversal of 872197289 is 982791278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 848265625 + 23931664 = 29125^2 + 4892^2 .

It is a cyclic number.

It is not a de Polignac number, because 872197289 - 2⁴ = 872197273 is a prime.

It is a super-2 number, since 2×872197289² = 1521456221877899042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 872197289.

It is not a weakly prime, because it can be changed into another prime (872197219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436098644 + 436098645.

It is an arithmetic number, because the mean of its divisors is an integer number (436098645).

Almost surely, 2^872197289 is an apocalyptic number.

It is an amenable number.

872197289 is a deficient number, since it is larger than the sum of its proper divisors (1).

872197289 is an equidigital number, since it uses as much as digits as its factorization.

872197289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 53.

The square root of 872197289 is about 29532.9864558260. The cubic root of 872197289 is about 955.4432813228.

The spelling of 872197289 in words is "eight hundred seventy-two million, one hundred ninety-seven thousand, two hundred eighty-nine".