1812536317 has 2 divisors, whose sum is σ = 1812536318. Its totient is φ = 1812536316.

The previous prime is 1812536291. The next prime is 1812536357. The reversal of 1812536317 is 7136352181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1548343801 + 264192516 = 39349^2 + 16254^2 .

It is a cyclic number.

It is not a de Polignac number, because 1812536317 - 2⁷ = 1812536189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1812536357) 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, 906268158 + 906268159.

It is an arithmetic number, because the mean of its divisors is an integer number (906268159).

Almost surely, 2^1812536317 is an apocalyptic number.

It is an amenable number.

1812536317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812536317 is an equidigital number, since it uses as much as digits as its factorization.

1812536317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 1812536317 is about 42573.8924342137. The cubic root of 1812536317 is about 1219.2578835689.

Adding to 1812536317 its reverse (7136352181), we get a palindrome (8948888498).

The spelling of 1812536317 in words is "one billion, eight hundred twelve million, five hundred thirty-six thousand, three hundred seventeen".