567726989 has 2 divisors, whose sum is σ = 567726990. Its totient is φ = 567726988.

The previous prime is 567726977. The next prime is 567727031. The reversal of 567726989 is 989627765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429194089 + 138532900 = 20717^2 + 11770^2 .

It is a cyclic number.

It is not a de Polignac number, because 567726989 - 2²⁸ = 299291533 is a prime.

It is a super-2 number, since 2×567726989² = 644627868078012242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (567726919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283863494 + 283863495.

It is an arithmetic number, because the mean of its divisors is an integer number (283863495).

Almost surely, 2^567726989 is an apocalyptic number.

It is an amenable number.

567726989 is a deficient number, since it is larger than the sum of its proper divisors (1).

567726989 is an equidigital number, since it uses as much as digits as its factorization.

567726989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 59.

The square root of 567726989 is about 23827.0222436628. The cubic root of 567726989 is about 828.0308421419.

The spelling of 567726989 in words is "five hundred sixty-seven million, seven hundred twenty-six thousand, nine hundred eighty-nine".