1155636913 has 2 divisors, whose sum is σ = 1155636914. Its totient is φ = 1155636912.

The previous prime is 1155636901. The next prime is 1155636917. The reversal of 1155636913 is 3196365511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 811794064 + 343842849 = 28492^2 + 18543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155636913 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155636917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577818456 + 577818457.

It is an arithmetic number, because the mean of its divisors is an integer number (577818457).

Almost surely, 2^1155636913 is an apocalyptic number.

It is an amenable number.

1155636913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155636913 is an equidigital number, since it uses as much as digits as its factorization.

1155636913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72900, while the sum is 40.

The square root of 1155636913 is about 33994.6600659574. The cubic root of 1155636913 is about 1049.3985710687.

The spelling of 1155636913 in words is "one billion, one hundred fifty-five million, six hundred thirty-six thousand, nine hundred thirteen".