872841569 has 2 divisors, whose sum is σ = 872841570. Its totient is φ = 872841568.

The previous prime is 872841547. The next prime is 872841667. The reversal of 872841569 is 965148278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 762864400 + 109977169 = 27620^2 + 10487^2 .

It is a cyclic number.

It is not a de Polignac number, because 872841569 - 2²⁰ = 871792993 is a prime.

It is a super-2 number, since 2×872841569² = 1523704809148763522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (872841539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436420784 + 436420785.

It is an arithmetic number, because the mean of its divisors is an integer number (436420785).

Almost surely, 2^872841569 is an apocalyptic number.

It is an amenable number.

872841569 is a deficient number, since it is larger than the sum of its proper divisors (1).

872841569 is an equidigital number, since it uses as much as digits as its factorization.

872841569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The square root of 872841569 is about 29543.8922452679. The cubic root of 872841569 is about 955.6784809714.

The spelling of 872841569 in words is "eight hundred seventy-two million, eight hundred forty-one thousand, five hundred sixty-nine".