1056563813 has 2 divisors, whose sum is σ = 1056563814. Its totient is φ = 1056563812.

The previous prime is 1056563773. The next prime is 1056563843. The reversal of 1056563813 is 3183656501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 845530084 + 211033729 = 29078^2 + 14527^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056563813 - 2¹⁰ = 1056562789 is a prime.

It is a super-2 number, since 2×1056563813² = 2232654181882197938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1056563843) 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, 528281906 + 528281907.

It is an arithmetic number, because the mean of its divisors is an integer number (528281907).

Almost surely, 2^1056563813 is an apocalyptic number.

It is an amenable number.

1056563813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056563813 is an equidigital number, since it uses as much as digits as its factorization.

1056563813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 1056563813 is about 32504.8275337680. The cubic root of 1056563813 is about 1018.5098749399.

The spelling of 1056563813 in words is "one billion, fifty-six million, five hundred sixty-three thousand, eight hundred thirteen".