1812137807 has 2 divisors, whose sum is σ = 1812137808. Its totient is φ = 1812137806.

The previous prime is 1812137783. The next prime is 1812137827. The reversal of 1812137807 is 7087312181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812137807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1812137827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906068903 + 906068904.

It is an arithmetic number, because the mean of its divisors is an integer number (906068904).

Almost surely, 2^1812137807 is an apocalyptic number.

1812137807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812137807 is an equidigital number, since it uses as much as digits as its factorization.

1812137807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 1812137807 is about 42569.2119612285. The cubic root of 1812137807 is about 1219.1685203806.

Adding to 1812137807 its reverse (7087312181), we get a palindrome (8899449988).

The spelling of 1812137807 in words is "one billion, eight hundred twelve million, one hundred thirty-seven thousand, eight hundred seven".