1340288137 has 2 divisors, whose sum is σ = 1340288138. Its totient is φ = 1340288136.

The previous prime is 1340288129. The next prime is 1340288189. The reversal of 1340288137 is 7318820431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1315077696 + 25210441 = 36264^2 + 5021^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340288137 - 2³ = 1340288129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1340288096 and 1340288105.

It is not a weakly prime, because it can be changed into another prime (1340288197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670144068 + 670144069.

It is an arithmetic number, because the mean of its divisors is an integer number (670144069).

Almost surely, 2^1340288137 is an apocalyptic number.

It is an amenable number.

1340288137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340288137 is an equidigital number, since it uses as much as digits as its factorization.

1340288137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1340288137 is about 36609.9458754039. The cubic root of 1340288137 is about 1102.5527865540.

The spelling of 1340288137 in words is "one billion, three hundred forty million, two hundred eighty-eight thousand, one hundred thirty-seven".