1340423387 has 2 divisors, whose sum is σ = 1340423388. Its totient is φ = 1340423386.

The previous prime is 1340423363. The next prime is 1340423411. The reversal of 1340423387 is 7833240431.

It is a balanced prime because it is at equal distance from previous prime (1340423363) and next prime (1340423411).

It is a cyclic number.

It is not a de Polignac number, because 1340423387 - 2⁸ = 1340423131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340423317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670211693 + 670211694.

It is an arithmetic number, because the mean of its divisors is an integer number (670211694).

Almost surely, 2^1340423387 is an apocalyptic number.

1340423387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340423387 is an equidigital number, since it uses as much as digits as its factorization.

1340423387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 1340423387 is about 36611.7930044405. The cubic root of 1340423387 is about 1102.5898719250.

The spelling of 1340423387 in words is "one billion, three hundred forty million, four hundred twenty-three thousand, three hundred eighty-seven".