564991069 has 4 divisors (see below), whose sum is σ = 565113600. Its totient is φ = 564868540.

The previous prime is 564991057. The next prime is 564991081. The reversal of 564991069 is 960199465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 960199465 = 5 ⋅192039893.

It is an interprime number because it is at equal distance from previous prime (564991057) and next prime (564991081).

It is a cyclic number.

It is not a de Polignac number, because 564991069 - 2⁷ = 564990941 is a prime.

It is a super-2 number, since 2×564991069² = 638429816099525522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564991099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54067 + ... + 63664.

It is an arithmetic number, because the mean of its divisors is an integer number (141278400).

Almost surely, 2^564991069 is an apocalyptic number.

It is an amenable number.

564991069 is a deficient number, since it is larger than the sum of its proper divisors (122531).

564991069 is a wasteful number, since it uses less digits than its factorization.

564991069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122530.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 564991069 is about 23769.5407822701. The cubic root of 564991069 is about 826.6985850023.

The spelling of 564991069 in words is "five hundred sixty-four million, nine hundred ninety-one thousand, sixty-nine".