1809130913 has 2 divisors, whose sum is σ = 1809130914. Its totient is φ = 1809130912.

The previous prime is 1809130903. The next prime is 1809130919. The reversal of 1809130913 is 3190319081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 914941504 + 894189409 = 30248^2 + 29903^2 .

It is a cyclic number.

It is not a de Polignac number, because 1809130913 - 2²⁰ = 1808082337 is a prime.

It is not a weakly prime, because it can be changed into another prime (1809130919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904565456 + 904565457.

It is an arithmetic number, because the mean of its divisors is an integer number (904565457).

Almost surely, 2^1809130913 is an apocalyptic number.

It is an amenable number.

1809130913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1809130913 is an equidigital number, since it uses as much as digits as its factorization.

1809130913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 1809130913 is about 42533.8795902749. The cubic root of 1809130913 is about 1218.4938218761.

Adding to 1809130913 its reverse (3190319081), we get a palindrome (4999449994).

The spelling of 1809130913 in words is "one billion, eight hundred nine million, one hundred thirty thousand, nine hundred thirteen".