1363645289 has 2 divisors, whose sum is σ = 1363645290. Its totient is φ = 1363645288.

The previous prime is 1363645277. The next prime is 1363645319. The reversal of 1363645289 is 9825463631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768675625 + 594969664 = 27725^2 + 24392^2 .

It is an emirp because it is prime and its reverse (9825463631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1363645289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1363645489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681822644 + 681822645.

It is an arithmetic number, because the mean of its divisors is an integer number (681822645).

Almost surely, 2^1363645289 is an apocalyptic number.

It is an amenable number.

1363645289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1363645289 is an equidigital number, since it uses as much as digits as its factorization.

1363645289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 47.

The square root of 1363645289 is about 36927.5681435970. The cubic root of 1363645289 is about 1108.9206533136.

The spelling of 1363645289 in words is "one billion, three hundred sixty-three million, six hundred forty-five thousand, two hundred eighty-nine".