1340947337 has 2 divisors, whose sum is σ = 1340947338. Its totient is φ = 1340947336.

The previous prime is 1340947331. The next prime is 1340947409. The reversal of 1340947337 is 7337490431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1217381881 + 123565456 = 34891^2 + 11116^2 .

It is an emirp because it is prime and its reverse (7337490431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340947337 - 2⁶ = 1340947273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1340947294 and 1340947303.

It is not a weakly prime, because it can be changed into another prime (1340947331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670473668 + 670473669.

It is an arithmetic number, because the mean of its divisors is an integer number (670473669).

Almost surely, 2^1340947337 is an apocalyptic number.

It is an amenable number.

1340947337 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340947337 is an equidigital number, since it uses as much as digits as its factorization.

1340947337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 41.

The square root of 1340947337 is about 36618.9477866309. The cubic root of 1340947337 is about 1102.7335147755.

The spelling of 1340947337 in words is "one billion, three hundred forty million, nine hundred forty-seven thousand, three hundred thirty-seven".