872865563 has 2 divisors, whose sum is σ = 872865564. Its totient is φ = 872865562.

The previous prime is 872865443. The next prime is 872865583. The reversal of 872865563 is 365568278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 872865563 - 2¹² = 872861467 is a prime.

It is not a weakly prime, because it can be changed into another prime (872865583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436432781 + 436432782.

It is an arithmetic number, because the mean of its divisors is an integer number (436432782).

Almost surely, 2^872865563 is an apocalyptic number.

872865563 is a deficient number, since it is larger than the sum of its proper divisors (1).

872865563 is an equidigital number, since it uses as much as digits as its factorization.

872865563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 50.

The square root of 872865563 is about 29544.2983162572. The cubic root of 872865563 is about 955.6872379403.

The spelling of 872865563 in words is "eight hundred seventy-two million, eight hundred sixty-five thousand, five hundred sixty-three".