1366421113 has 2 divisors, whose sum is σ = 1366421114. Its totient is φ = 1366421112.

The previous prime is 1366421093. The next prime is 1366421117. The reversal of 1366421113 is 3111246631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1105695504 + 260725609 = 33252^2 + 16147^2 .

It is an emirp because it is prime and its reverse (3111246631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1366421113 - 2¹³ = 1366412921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1366421117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683210556 + 683210557.

It is an arithmetic number, because the mean of its divisors is an integer number (683210557).

Almost surely, 2^1366421113 is an apocalyptic number.

It is an amenable number.

1366421113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366421113 is an equidigital number, since it uses as much as digits as its factorization.

1366421113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 1366421113 is about 36965.1337478982. The cubic root of 1366421113 is about 1109.6725796189.

Adding to 1366421113 its reverse (3111246631), we get a palindrome (4477667744).

The spelling of 1366421113 in words is "one billion, three hundred sixty-six million, four hundred twenty-one thousand, one hundred thirteen".