1811013049 has 2 divisors, whose sum is σ = 1811013050. Its totient is φ = 1811013048.

The previous prime is 1811013019. The next prime is 1811013067. The reversal of 1811013049 is 9403101181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1780840000 + 30173049 = 42200^2 + 5493^2 .

It is an emirp because it is prime and its reverse (9403101181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1811013049 - 2¹¹ = 1811011001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1811013019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905506524 + 905506525.

It is an arithmetic number, because the mean of its divisors is an integer number (905506525).

Almost surely, 2^1811013049 is an apocalyptic number.

It is an amenable number.

1811013049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1811013049 is an equidigital number, since it uses as much as digits as its factorization.

1811013049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 1811013049 is about 42555.9989778175. The cubic root of 1811013049 is about 1218.9162302685.

The spelling of 1811013049 in words is "one billion, eight hundred eleven million, thirteen thousand, forty-nine".