1185228013 has 2 divisors, whose sum is σ = 1185228014. Its totient is φ = 1185228012.

The previous prime is 1185227969. The next prime is 1185228043. The reversal of 1185228013 is 3108225811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1182465769 + 2762244 = 34387^2 + 1662^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1185228013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1185228043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592614006 + 592614007.

It is an arithmetic number, because the mean of its divisors is an integer number (592614007).

Almost surely, 2^1185228013 is an apocalyptic number.

It is an amenable number.

1185228013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1185228013 is an equidigital number, since it uses as much as digits as its factorization.

1185228013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1185228013 is about 34427.1406451364. The cubic root of 1185228013 is about 1058.2801149974.

The spelling of 1185228013 in words is "one billion, one hundred eighty-five million, two hundred twenty-eight thousand, thirteen".