564989473 has 2 divisors, whose sum is σ = 564989474. Its totient is φ = 564989472.

The previous prime is 564989461. The next prime is 564989479. The reversal of 564989473 is 374989465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461906064 + 103083409 = 21492^2 + 10153^2 .

It is a cyclic number.

It is not a de Polignac number, because 564989473 - 2²⁵ = 531435041 is a prime.

It is not a weakly prime, because it can be changed into another prime (564989479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282494736 + 282494737.

It is an arithmetic number, because the mean of its divisors is an integer number (282494737).

Almost surely, 2^564989473 is an apocalyptic number.

It is an amenable number.

564989473 is a deficient number, since it is larger than the sum of its proper divisors (1).

564989473 is an equidigital number, since it uses as much as digits as its factorization.

564989473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The square root of 564989473 is about 23769.5072098687. The cubic root of 564989473 is about 826.6978065757.

The spelling of 564989473 in words is "five hundred sixty-four million, nine hundred eighty-nine thousand, four hundred seventy-three".