884117561 has 2 divisors, whose sum is σ = 884117562. Its totient is φ = 884117560.

The previous prime is 884117497. The next prime is 884117569. The reversal of 884117561 is 165711488.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470239225 + 413878336 = 21685^2 + 20344^2 .

It is a cyclic number.

It is not a de Polignac number, because 884117561 - 2⁶ = 884117497 is a prime.

It is not a weakly prime, because it can be changed into another prime (884117569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442058780 + 442058781.

It is an arithmetic number, because the mean of its divisors is an integer number (442058781).

Almost surely, 2^884117561 is an apocalyptic number.

It is an amenable number.

884117561 is a deficient number, since it is larger than the sum of its proper divisors (1).

884117561 is an equidigital number, since it uses as much as digits as its factorization.

884117561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 41.

The square root of 884117561 is about 29734.1144310706. The cubic root of 884117561 is about 959.7762647735.

The spelling of 884117561 in words is "eight hundred eighty-four million, one hundred seventeen thousand, five hundred sixty-one".