1340404207 has 2 divisors, whose sum is σ = 1340404208. Its totient is φ = 1340404206.

The previous prime is 1340404181. The next prime is 1340404237. The reversal of 1340404207 is 7024040431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340404207 - 2²³ = 1332015599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340404237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670202103 + 670202104.

It is an arithmetic number, because the mean of its divisors is an integer number (670202104).

Almost surely, 2^1340404207 is an apocalyptic number.

1340404207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340404207 is an equidigital number, since it uses as much as digits as its factorization.

1340404207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 1340404207 is about 36611.5310660453. The cubic root of 1340404207 is about 1102.5846129462.

Adding to 1340404207 its reverse (7024040431), we get a palindrome (8364444638).

The spelling of 1340404207 in words is "one billion, three hundred forty million, four hundred four thousand, two hundred seven".