7812308137 has 2 divisors, whose sum is σ = 7812308138. Its totient is φ = 7812308136.

The previous prime is 7812308111. The next prime is 7812308221. The reversal of 7812308137 is 7318032187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7775536041 + 36772096 = 88179^2 + 6064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7812308137 is a prime.

It is a super-2 number, since 2×7812308137² (a number of 21 digits) contains 22 as substring.

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 7812308137.

It is not a weakly prime, because it can be changed into another prime (7812308237) 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, 3906154068 + 3906154069.

It is an arithmetic number, because the mean of its divisors is an integer number (3906154069).

Almost surely, 2^7812308137 is an apocalyptic number.

It is an amenable number.

7812308137 is a deficient number, since it is larger than the sum of its proper divisors (1).

7812308137 is an equidigital number, since it uses as much as digits as its factorization.

7812308137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 7812308137 is about 88387.2623006279. The cubic root of 7812308137 is about 1984.2350714391.

The spelling of 7812308137 in words is "seven billion, eight hundred twelve million, three hundred eight thousand, one hundred thirty-seven".