1366223473 has 2 divisors, whose sum is σ = 1366223474. Its totient is φ = 1366223472.

The previous prime is 1366223471. The next prime is 1366223489. The reversal of 1366223473 is 3743226631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1252310544 + 113912929 = 35388^2 + 10673^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366223473 - 2¹ = 1366223471 is a prime.

Together with 1366223471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1366223471) 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, 683111736 + 683111737.

It is an arithmetic number, because the mean of its divisors is an integer number (683111737).

Almost surely, 2^1366223473 is an apocalyptic number.

It is an amenable number.

1366223473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366223473 is an equidigital number, since it uses as much as digits as its factorization.

1366223473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 37.

The square root of 1366223473 is about 36962.4603212503. The cubic root of 1366223473 is about 1109.6190757951.

The spelling of 1366223473 in words is "one billion, three hundred sixty-six million, two hundred twenty-three thousand, four hundred seventy-three".