1340277469 has 2 divisors, whose sum is σ = 1340277470. Its totient is φ = 1340277468.

The previous prime is 1340277431. The next prime is 1340277473. The reversal of 1340277469 is 9647720431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 857904100 + 482373369 = 29290^2 + 21963^2 .

It is an emirp because it is prime and its reverse (9647720431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340277469 - 2¹³ = 1340269277 is a prime.

It is a super-2 number, since 2×1340277469² = 3592687387818091922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340877469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670138734 + 670138735.

It is an arithmetic number, because the mean of its divisors is an integer number (670138735).

Almost surely, 2^1340277469 is an apocalyptic number.

It is an amenable number.

1340277469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340277469 is an equidigital number, since it uses as much as digits as its factorization.

1340277469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 1340277469 is about 36609.8001770018. The cubic root of 1340277469 is about 1102.5498612963.

The spelling of 1340277469 in words is "one billion, three hundred forty million, two hundred seventy-seven thousand, four hundred sixty-nine".