340512278137 has 2 divisors, whose sum is σ = 340512278138. Its totient is φ = 340512278136.

The previous prime is 340512278123. The next prime is 340512278173. The reversal of 340512278137 is 731872215043.

Together with next prime (340512278173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340284388921 + 227889216 = 583339^2 + 15096^2 .

It is an emirp because it is prime and its reverse (731872215043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340512278137 - 2¹¹ = 340512276089 is a prime.

It is a super-2 number, since 2×340512278137² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 340512278093 and 340512278102.

It is not a weakly prime, because it can be changed into another prime (340512278107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170256139068 + 170256139069.

It is an arithmetic number, because the mean of its divisors is an integer number (170256139069).

Almost surely, 2^340512278137 is an apocalyptic number.

It is an amenable number.

340512278137 is a deficient number, since it is larger than the sum of its proper divisors (1).

340512278137 is an equidigital number, since it uses as much as digits as its factorization.

340512278137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 340512278137 in words is "three hundred forty billion, five hundred twelve million, two hundred seventy-eight thousand, one hundred thirty-seven".