1366042393 has 2 divisors, whose sum is σ = 1366042394. Its totient is φ = 1366042392.

The previous prime is 1366042313. The next prime is 1366042409. The reversal of 1366042393 is 3932406631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1008189504 + 357852889 = 31752^2 + 18917^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366042393 - 2⁹ = 1366041881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1366042313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683021196 + 683021197.

It is an arithmetic number, because the mean of its divisors is an integer number (683021197).

Almost surely, 2^1366042393 is an apocalyptic number.

It is an amenable number.

1366042393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366042393 is an equidigital number, since it uses as much as digits as its factorization.

1366042393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 1366042393 is about 36960.0107278123. The cubic root of 1366042393 is about 1109.5700504577.

The spelling of 1366042393 in words is "one billion, three hundred sixty-six million, forty-two thousand, three hundred ninety-three".