1366905913 has 2 divisors, whose sum is σ = 1366905914. Its totient is φ = 1366905912.

The previous prime is 1366905857. The next prime is 1366905919. The reversal of 1366905913 is 3195096631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 691321849 + 675584064 = 26293^2 + 25992^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366905913 - 2²¹ = 1364808761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1366905913.

It is not a weakly prime, because it can be changed into another prime (1366905919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683452956 + 683452957.

It is an arithmetic number, because the mean of its divisors is an integer number (683452957).

Almost surely, 2^1366905913 is an apocalyptic number.

It is an amenable number.

1366905913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366905913 is an equidigital number, since it uses as much as digits as its factorization.

1366905913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 1366905913 is about 36971.6906970725. The cubic root of 1366905913 is about 1109.8037996972.

The spelling of 1366905913 in words is "one billion, three hundred sixty-six million, nine hundred five thousand, nine hundred thirteen".