1340933509 has 2 divisors, whose sum is σ = 1340933510. Its totient is φ = 1340933508.

The previous prime is 1340933501. The next prime is 1340933521. The reversal of 1340933509 is 9053390431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1261812484 + 79121025 = 35522^2 + 8895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340933509 - 2³ = 1340933501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340933501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670466754 + 670466755.

It is an arithmetic number, because the mean of its divisors is an integer number (670466755).

Almost surely, 2^1340933509 is an apocalyptic number.

It is an amenable number.

1340933509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340933509 is an equidigital number, since it uses as much as digits as its factorization.

1340933509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 37.

The square root of 1340933509 is about 36618.7589767867. The cubic root of 1340933509 is about 1102.7297242583.

The spelling of 1340933509 in words is "one billion, three hundred forty million, nine hundred thirty-three thousand, five hundred nine".