561786847 has 2 divisors, whose sum is σ = 561786848. Its totient is φ = 561786846.

The previous prime is 561786839. The next prime is 561786853. The reversal of 561786847 is 748687165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561786847 - 2³ = 561786839 is a prime.

It is a super-2 number, since 2×561786847² = 631208922924402818, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561786794 and 561786803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561786857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280893423 + 280893424.

It is an arithmetic number, because the mean of its divisors is an integer number (280893424).

Almost surely, 2^561786847 is an apocalyptic number.

561786847 is a deficient number, since it is larger than the sum of its proper divisors (1).

561786847 is an equidigital number, since it uses as much as digits as its factorization.

561786847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 52.

The square root of 561786847 is about 23702.0430975897. The cubic root of 561786847 is about 825.1328084938.

The spelling of 561786847 in words is "five hundred sixty-one million, seven hundred eighty-six thousand, eight hundred forty-seven".