1340333389 has 2 divisors, whose sum is σ = 1340333390. Its totient is φ = 1340333388.

The previous prime is 1340333387. The next prime is 1340333437. The reversal of 1340333389 is 9833330431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 938932164 + 401401225 = 30642^2 + 20035^2 .

It is an emirp because it is prime and its reverse (9833330431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340333389 - 2¹ = 1340333387 is a prime.

Together with 1340333387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340333381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670166694 + 670166695.

It is an arithmetic number, because the mean of its divisors is an integer number (670166695).

Almost surely, 2^1340333389 is an apocalyptic number.

It is an amenable number.

1340333389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340333389 is an equidigital number, since it uses as much as digits as its factorization.

1340333389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 1340333389 is about 36610.5638989623. The cubic root of 1340333389 is about 1102.5651948702.

The spelling of 1340333389 in words is "one billion, three hundred forty million, three hundred thirty-three thousand, three hundred eighty-nine".