1354666409 has 2 divisors, whose sum is σ = 1354666410. Its totient is φ = 1354666408.

The previous prime is 1354666387. The next prime is 1354666433. The reversal of 1354666409 is 9046664531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1354240000 + 426409 = 36800^2 + 653^2 .

It is an emirp because it is prime and its reverse (9046664531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1354666409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1354666409.

It is not a weakly prime, because it can be changed into another prime (1354666499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677333204 + 677333205.

It is an arithmetic number, because the mean of its divisors is an integer number (677333205).

Almost surely, 2^1354666409 is an apocalyptic number.

It is an amenable number.

1354666409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1354666409 is an equidigital number, since it uses as much as digits as its factorization.

1354666409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 1354666409 is about 36805.7931445581. The cubic root of 1354666409 is about 1106.4814072216.

The spelling of 1354666409 in words is "one billion, three hundred fifty-four million, six hundred sixty-six thousand, four hundred nine".