567991 has 2 divisors, whose sum is σ = 567992. Its totient is φ = 567990.

The previous prime is 567979. The next prime is 567997. The reversal of 567991 is 199765.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 567991 - 2⁷ = 567863 is a prime.

It is a super-2 number, since 2×567991² = 645227552162, which contains 22 as substring.

567991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 567991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (567997) 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, 283995 + 283996.

It is an arithmetic number, because the mean of its divisors is an integer number (283996).

2⁵⁶⁷⁹⁹¹ is an apocalyptic number.

567991 is a deficient number, since it is larger than the sum of its proper divisors (1).

567991 is an equidigital number, since it uses as much as digits as its factorization.

567991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 37.

The square root of 567991 is about 753.6517763530. The cubic root of 567991 is about 82.8159175758.

The spelling of 567991 in words is "five hundred sixty-seven thousand, nine hundred ninety-one".