1113065861 has 2 divisors, whose sum is σ = 1113065862. Its totient is φ = 1113065860.

The previous prime is 1113065777. The next prime is 1113065897. The reversal of 1113065861 is 1685603111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1085702500 + 27363361 = 32950^2 + 5231^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113065861 - 2¹⁰ = 1113064837 is a prime.

It is a super-2 number, since 2×1113065861² = 2477831221847342642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113065461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556532930 + 556532931.

It is an arithmetic number, because the mean of its divisors is an integer number (556532931).

Almost surely, 2^1113065861 is an apocalyptic number.

It is an amenable number.

1113065861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113065861 is an equidigital number, since it uses as much as digits as its factorization.

1113065861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1113065861 is about 33362.6416969640. The cubic root of 1113065861 is about 1036.3511990521.

Adding to 1113065861 its reverse (1685603111), we get a palindrome (2798668972).

The spelling of 1113065861 in words is "one billion, one hundred thirteen million, sixty-five thousand, eight hundred sixty-one".