1155418013 has 2 divisors, whose sum is σ = 1155418014. Its totient is φ = 1155418012.

The previous prime is 1155417997. The next prime is 1155418021. The reversal of 1155418013 is 3108145511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 865124569 + 290293444 = 29413^2 + 17038^2 .

It is an emirp because it is prime and its reverse (3108145511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155418013 - 2⁴ = 1155417997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155418513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577709006 + 577709007.

It is an arithmetic number, because the mean of its divisors is an integer number (577709007).

Almost surely, 2^1155418013 is an apocalyptic number.

It is an amenable number.

1155418013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155418013 is an equidigital number, since it uses as much as digits as its factorization.

1155418013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 29.

The square root of 1155418013 is about 33991.4402901672. The cubic root of 1155418013 is about 1049.3323080841.

The spelling of 1155418013 in words is "one billion, one hundred fifty-five million, four hundred eighteen thousand, thirteen".