564930881 has 2 divisors, whose sum is σ = 564930882.
Its totient is φ = 564930880.
The previous prime is 564930829. The next prime is 564930907. The reversal of 564930881 is 188039465.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 563587600 + 1343281 = 23740^2 + 1159^2
It is a cyclic number.
It is not a de Polignac number, because 564930881 - 218 = 564668737 is a prime.
It is a super-2 number, since 2×5649308812 = 638293800614872322, which contains 22 as substring.
It is equal to p29586923 and since 564930881 and 29586923 have the same sum of digits, it is a Honaker prime.
It is not a weakly prime, because it can be changed into another prime (564930181) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282465440 + 282465441.
It is an arithmetic number, because the mean of its divisors is an integer number (282465441).
Almost surely, 2564930881 is an apocalyptic number.
It is an amenable number.
564930881 is a deficient number, since it is larger than the sum of its proper divisors (1).
564930881 is an equidigital number, since it uses as much as digits as its factorization.
564930881 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 207360, while the sum is 44.
The square root of 564930881 is about 23768.2746744479.
The cubic root of 564930881 is about 826.6692281362.
The spelling of 564930881 in words is "five hundred sixty-four million, nine hundred thirty thousand, eight hundred eighty-one".